diff --git a/frontend/src/components/Arena.tsx b/frontend/src/components/Arena.tsx
index 91cc7ee..ce7731d 100644
--- a/frontend/src/components/Arena.tsx
+++ b/frontend/src/components/Arena.tsx
@@ -54,6 +54,10 @@ export default function Arena({
   const t = dict(lang);
   const aShort = teamShort(match.teamA, lang);
   const bShort = teamShort(match.teamB, lang);
+  // 한국을 항상 왼쪽에 표시(요청). 상태·투표 제출은 원본 A/B 프레임 그대로, 화면 좌우만 교체.
+  const flip = match.teamB.code === "KOR" && match.teamA.code !== "KOR";
+  const leftShort = flip ? bShort : aShort;
+  const rightShort = flip ? aShort : bShort;
   const [outcome, setOutcome] = useState<Outcome | null>("DRAW");
   const [scoreA, setScoreA] = useState(0);
   const [scoreB, setScoreB] = useState(0);
@@ -135,7 +139,7 @@ export default function Arena({
 
   const shareText = useMemo(() => {
     if (!outcome) return "";
-    const me = `${aShort} ${scoreA}-${scoreB} ${bShort}`;
+    const me = `${leftShort} ${flip ? scoreB : scoreA}-${flip ? scoreA : scoreB} ${rightShort}`;
     const sameAI = matched.map((m) => m.model).join("·");
     if (lang === "en") {
       return sameAI
@@ -217,7 +221,7 @@ export default function Arena({
                     </div>
                   </div>
                   <div className="ml-auto shrink-0 whitespace-nowrap font-mono text-[28px] font-extrabold tabular-nums">
-                    {p.scoreA}&nbsp;-&nbsp;{p.scoreB}
+                    {flip ? p.scoreB : p.scoreA}&nbsp;-&nbsp;{flip ? p.scoreA : p.scoreB}
                   </div>
                 </div>
 
@@ -240,11 +244,17 @@ export default function Arena({
 
         <div className="mt-3 grid grid-cols-3 gap-2">
           {(
-            [
-              ["TEAM_A_WIN", `${aShort} ${t.win}`],
-              ["DRAW", t.drawLabel],
-              ["TEAM_B_WIN", `${bShort} ${t.win}`],
-            ] as [Outcome, string][]
+            (flip
+              ? [
+                  ["TEAM_B_WIN", `${bShort} ${t.win}`],
+                  ["DRAW", t.drawLabel],
+                  ["TEAM_A_WIN", `${aShort} ${t.win}`],
+                ]
+              : [
+                  ["TEAM_A_WIN", `${aShort} ${t.win}`],
+                  ["DRAW", t.drawLabel],
+                  ["TEAM_B_WIN", `${bShort} ${t.win}`],
+                ]) as [Outcome, string][]
           ).map(([val, label]) => (
             <button
               key={val}
@@ -262,9 +272,19 @@ export default function Arena({
         </div>
 
         <div className="mt-3 flex items-center justify-center gap-5 rounded-xl border border-[var(--line-l)] bg-white py-3">
-          <Stepper label={aShort} value={scoreA} onChange={setScoreA} disabled={disabled} />
-          <span className="text-[26px] font-extrabold text-[var(--ink-muted)]">:</span>
-          <Stepper label={bShort} value={scoreB} onChange={setScoreB} disabled={disabled} />
+          {flip ? (
+            <>
+              <Stepper label={bShort} value={scoreB} onChange={setScoreB} disabled={disabled} />
+              <span className="text-[26px] font-extrabold text-[var(--ink-muted)]">:</span>
+              <Stepper label={aShort} value={scoreA} onChange={setScoreA} disabled={disabled} />
+            </>
+          ) : (
+            <>
+              <Stepper label={aShort} value={scoreA} onChange={setScoreA} disabled={disabled} />
+              <span className="text-[26px] font-extrabold text-[var(--ink-muted)]">:</span>
+              <Stepper label={bShort} value={scoreB} onChange={setScoreB} disabled={disabled} />
+            </>
+          )}
         </div>
       </section>
 
@@ -273,7 +293,7 @@ export default function Arena({
         <section className="mt-5 rounded-2xl border border-[var(--green)]/50 bg-[var(--bg2)] p-5">
           <div className="text-[13px] text-[var(--ink-muted)]">{t.finalResult}</div>
           <div className="mt-1 text-[26px] font-extrabold">
-            {aShort} {match.result.scoreA}-{match.result.scoreB} {bShort}
+            {leftShort} {flip ? match.result.scoreB : match.result.scoreA}-{flip ? match.result.scoreA : match.result.scoreB} {rightShort}
             <span className="ml-2 text-[16px] font-bold text-[var(--green)]">
               {outcomeLabel(match, match.result.outcome, lang)}
             </span>
@@ -361,7 +381,7 @@ export default function Arena({
         <div className="mt-5 rounded-2xl border border-[var(--green)]/50 bg-[var(--bg2)] p-5">
           <div className="text-[13px] text-[var(--ink-muted)]">{t.myPick}</div>
           <div className="mt-1 text-[26px] font-extrabold">
-            {aShort} {scoreA}-{scoreB} {bShort}
+            {leftShort} {flip ? scoreB : scoreA}-{flip ? scoreA : scoreB} {rightShort}
             <span className="ml-2 text-[16px] font-bold text-[var(--green)]">
               {outcomeLabel(match, outcome, lang)}
             </span>
@@ -397,8 +417,11 @@ export default function Arena({
           <ul className="flex flex-col gap-2">
             {(votesExpanded ? myPreds : myPreds.slice(0, 1)).map((p) => {
               const isThis = p.matchId === match.matchId;
+              const pFlip = p.teamB.code === "KOR" && p.teamA.code !== "KOR";
               const pA = teamShort(p.teamA, lang);
               const pB = teamShort(p.teamB, lang);
+              const pLeft = pFlip ? pB : pA;
+              const pRight = pFlip ? pA : pB;
               const pickTxt =
                 p.outcome === "TEAM_A_WIN"
                   ? `${pA} ${t.win}`
@@ -416,7 +439,7 @@ export default function Arena({
                 >
                   <div className="min-w-0">
                     <div className="text-[15px] font-bold text-white">
-                      {pA} {p.scoreA}-{p.scoreB} {pB}
+                      {pLeft} {pFlip ? p.scoreB : p.scoreA}-{pFlip ? p.scoreA : p.scoreB} {pRight}
                     </div>
                     <div className="mt-0.5 text-[12px] text-[var(--ink-muted)]">
                       {pickTxt}
@@ -546,7 +569,13 @@ export default function Arena({
         <div className="flex h-14 overflow-hidden rounded-2xl border border-[var(--line-d)]">
           {(() => {
             const [a, d, b] = pctParts([crowd.teamAWin, crowd.draw, crowd.teamBWin]);
-            return (
+            return flip ? (
+              <>
+                <CrowdSeg team={match.teamB} value={b} tone="a" />
+                <CrowdSeg value={d} tone="draw" />
+                <CrowdSeg team={match.teamA} value={a} tone="b" />
+              </>
+            ) : (
               <>
                 <CrowdSeg team={match.teamA} value={a} tone="a" />
                 <CrowdSeg value={d} tone="draw" />
diff --git a/frontend/src/components/Hero.tsx b/frontend/src/components/Hero.tsx
index 8f751c8..78e75ec 100644
--- a/frontend/src/components/Hero.tsx
+++ b/frontend/src/components/Hero.tsx
@@ -1,4 +1,4 @@
-import { Link } from "react-router-dom";
+import { Link, useNavigate } from "react-router-dom";
 import ShareButton from "./ShareButton";
 import LangSwitch from "./LangSwitch";
 import { type Lang, dict } from "@/lib/i18n";
@@ -16,13 +16,23 @@ export default function Hero({
   lang?: Lang;
 }) {
   const t = dict(lang);
+  const navigate = useNavigate();
   const home = lang === "en" ? "/?lang=en" : "/";
+  // 뒤로가기: 앱 내 이력이 있으면 직전 페이지로 그대로 복귀(전체 일정의 선택 날짜 보존),
+  // 없으면(공유 링크로 직접 진입 등) 전체 일정으로 이동.
+  const goBack = (e: React.MouseEvent) => {
+    e.preventDefault();
+    const idx = (window.history.state?.idx as number | undefined) ?? 0;
+    if (idx > 0) navigate(-1);
+    else navigate(home);
+  };
   return (
     <header className="pt-5 text-center">
       {back && (
         <div className="mb-3 flex items-center justify-between">
           <Link
             to={home}
+            onClick={goBack}
             className="flex items-center gap-1.5 rounded-full border border-white/12 bg-white/8 px-[18px] py-[9px] text-[18px] font-bold text-white/85 active:scale-95"
           >
             {t.back}
diff --git a/frontend/src/components/MatchupHUD.tsx b/frontend/src/components/MatchupHUD.tsx
index 1e8c38a..f874931 100644
--- a/frontend/src/components/MatchupHUD.tsx
+++ b/frontend/src/components/MatchupHUD.tsx
@@ -1,6 +1,6 @@
 import type { Match } from "@/lib/types";
 import { kickoffDisplay } from "@/lib/format";
-import { type Lang, dict } from "@/lib/i18n";
+import { type Lang, dict, teamShort } from "@/lib/i18n";
 import BallIcon from "./BallIcon";
 import TeamFlag from "./TeamFlag";
 
@@ -8,6 +8,12 @@ export default function MatchupHUD({ match, lang = "ko" }: { match: Match; lang?
   const t = dict(lang);
   const { group } = match;
   const finished = !!match.result;
+  // 한국을 항상 왼쪽에 표시(요청). 데이터/투표는 원본 A/B 프레임 유지, 화면 좌우만 교체.
+  const flip = match.teamB.code === "KOR" && match.teamA.code !== "KOR";
+  const left = flip ? match.teamB : match.teamA;
+  const right = flip ? match.teamA : match.teamB;
+  const leftScore = flip ? match.result?.scoreB : match.result?.scoreA;
+  const rightScore = flip ? match.result?.scoreA : match.result?.scoreB;
   return (
     <section className="mt-6">
       {/* 대결 카드 (녹색 글로우 보더) */}
@@ -20,8 +26,8 @@ export default function MatchupHUD({ match, lang = "ko" }: { match: Match; lang?
           <BallIcon className="h-14 w-14 shrink-0" />
           <div className="min-w-0">
             <div className="text-[22px] font-extrabold leading-tight">
-              {match.teamA.name} <span className="text-white/55">vs</span>{" "}
-              {match.teamB.name}
+              {teamShort(left, lang)} <span className="text-white/55">vs</span>{" "}
+              {teamShort(right, lang)}
             </div>
             <div className="mt-1 text-[15px] font-bold text-[var(--green)]">
               {kickoffDisplay(match.kickoffKst, lang)} · {t.group(group)}
@@ -32,14 +38,14 @@ export default function MatchupHUD({ match, lang = "ko" }: { match: Match; lang?
 
         {/* 국기 + 라이트닝 VS (종료 시 최종 스코어) */}
         <div className="mt-5 grid grid-cols-[1fr_auto_1fr] items-center gap-3">
-          <TeamFlag team={match.teamA} className="mx-auto h-[68px] w-[104px]" />
+          <TeamFlag team={left} className="mx-auto h-[68px] w-[104px]" />
           <div className="relative grid place-items-center">
             <div className="vs-glow absolute h-28 w-28" />
             {finished && match.result ? (
               <span className="relative whitespace-nowrap font-mono text-[34px] font-extrabold tabular-nums text-white">
-                {match.result.scoreA}
+                {leftScore}
                 <span className="px-1 text-white/55">-</span>
-                {match.result.scoreB}
+                {rightScore}
               </span>
             ) : (
               <span
@@ -50,7 +56,7 @@ export default function MatchupHUD({ match, lang = "ko" }: { match: Match; lang?
               </span>
             )}
           </div>
-          <TeamFlag team={match.teamB} className="mx-auto h-[68px] w-[104px]" />
+          <TeamFlag team={right} className="mx-auto h-[68px] w-[104px]" />
         </div>
 
         {finished && (
diff --git a/frontend/src/components/ScheduleBoard.tsx b/frontend/src/components/ScheduleBoard.tsx
index 556f8a9..d190510 100644
--- a/frontend/src/components/ScheduleBoard.tsx
+++ b/frontend/src/components/ScheduleBoard.tsx
@@ -32,7 +32,9 @@ export default function ScheduleBoard({
   lang?: Lang;
 }) {
   const t = dict(lang);
-  const [tab, setTab] = useState<Tab>("date");
+  const [tab, setTab] = useState<Tab>(() =>
+    sessionStorage.getItem("tp.sched.tab") === "group" ? "group" : "date",
+  );
 
   // 날짜·조 목록 (정렬)
   const dates = useMemo(
@@ -44,14 +46,30 @@ export default function ScheduleBoard({
     [matches],
   );
 
-  // 기본 선택: 오늘(없으면 첫 날짜) / A조
+  // 기본 선택: 오늘(없으면 첫 날짜) / A조.
+  // 단, 직전 세션 선택을 sessionStorage 에 보관 → 상세 진입 후 뒤로가기 시 그대로 복원(오늘로 초기화 X).
   const todayKey = useMemo(() => new Date().toISOString().slice(0, 10), []);
-  const [selDate, setSelDate] = useState(
-    () => (dates.includes(todayKey) ? todayKey : dates[0]) ?? "",
-  );
-  const [selGroup, setSelGroup] = useState(
-    () => (groups.includes("A") ? "A" : groups[0]) ?? "",
-  );
+  const [selDate, setSelDate] = useState(() => {
+    const saved = sessionStorage.getItem("tp.sched.date");
+    if (saved && dates.includes(saved)) return saved;
+    return (dates.includes(todayKey) ? todayKey : dates[0]) ?? "";
+  });
+  const [selGroup, setSelGroup] = useState(() => {
+    const saved = sessionStorage.getItem("tp.sched.group");
+    if (saved && groups.includes(saved)) return saved;
+    return (groups.includes("A") ? "A" : groups[0]) ?? "";
+  });
+
+  // 선택 변경 시 보관(다음 진입/뒤로가기에서 복원)
+  useEffect(() => {
+    if (selDate) sessionStorage.setItem("tp.sched.date", selDate);
+  }, [selDate]);
+  useEffect(() => {
+    if (selGroup) sessionStorage.setItem("tp.sched.group", selGroup);
+  }, [selGroup]);
+  useEffect(() => {
+    sessionStorage.setItem("tp.sched.tab", tab);
+  }, [tab]);
 
   const shown = useMemo(() => {
     const list =
@@ -234,6 +252,12 @@ function MatchCard({ match, lang }: { match: Match; lang: Lang }) {
   const t = dict(lang);
   const phase = match.phase;
   const finished = !!match.result;
+  // 한국을 항상 왼쪽에 표시(상세 페이지와 동일 규칙). 데이터는 원본 A/B 유지, 화면 좌우만 교체.
+  const flip = match.teamB.code === "KOR" && match.teamA.code !== "KOR";
+  const left = flip ? match.teamB : match.teamA;
+  const right = flip ? match.teamA : match.teamB;
+  const leftScore = flip ? match.result?.scoreB : match.result?.scoreA;
+  const rightScore = flip ? match.result?.scoreA : match.result?.scoreB;
 
   // 비투표(타 조)는 클릭 비활성, 투표 가능 조(A)는 상세로 이동
   const inner = (
@@ -255,21 +279,21 @@ function MatchCard({ match, lang }: { match: Match; lang: Lang }) {
 
       <div className="mt-3 grid grid-cols-[1fr_auto_1fr] items-center gap-2">
         <div className="flex items-center gap-2">
-          <TeamFlag team={match.teamA} className="h-6 w-9 shrink-0" />
-          <span className="truncate text-[15px] font-extrabold">{teamShort(match.teamA, lang)}</span>
+          <TeamFlag team={left} className="h-6 w-9 shrink-0" />
+          <span className="truncate text-[15px] font-extrabold">{teamShort(left, lang)}</span>
         </div>
         {match.result ? (
           <span className="whitespace-nowrap font-mono text-[18px] font-extrabold tabular-nums text-white">
-            {match.result.scoreA}
+            {leftScore}
             <span className="px-1.5 text-white/40">:</span>
-            {match.result.scoreB}
+            {rightScore}
           </span>
         ) : (
           <span className="font-impact text-[18px] italic text-[#94FBE0]">VS</span>
         )}
         <div className="flex items-center justify-end gap-2">
-          <span className="truncate text-right text-[15px] font-extrabold">{teamShort(match.teamB, lang)}</span>
-          <TeamFlag team={match.teamB} className="h-6 w-9 shrink-0" />
+          <span className="truncate text-right text-[15px] font-extrabold">{teamShort(right, lang)}</span>
+          <TeamFlag team={right} className="h-6 w-9 shrink-0" />
         </div>
       </div>
 
diff --git a/frontend/src/pages/MatchDetail.tsx b/frontend/src/pages/MatchDetail.tsx
index 1394059..976105e 100644
--- a/frontend/src/pages/MatchDetail.tsx
+++ b/frontend/src/pages/MatchDetail.tsx
@@ -57,7 +57,11 @@ export default function MatchDetail() {
 
   const aShort = teamShort(match.teamA, lang);
   const bShort = teamShort(match.teamB, lang);
-  const hook = lang === "en" ? t.hook(aShort, bShort) : match.hookText;
+  // 한국을 항상 왼쪽에 표시(요청)와 동일하게 공유 제목/후킹 카피도 한국 먼저.
+  const flip = match.teamB.code === "KOR" && match.teamA.code !== "KOR";
+  const leftShort = flip ? bShort : aShort;
+  const rightShort = flip ? aShort : bShort;
+  const hook = lang === "en" ? t.hook(leftShort, rightShort) : match.hookText;
   const url = matchUrl(match.matchId);
 
   return (
@@ -67,7 +71,7 @@ export default function MatchDetail() {
         lang={lang}
         share={{
           url,
-          title: `${aShort} vs ${bShort} — TriplePick`,
+          title: `${leftShort} vs ${rightShort} — TriplePick`,
           text:
             lang === "en"
               ? `${hook} — see all 3 AI picks and make yours!`