diff --git a/src/components/game/Game.tsx b/src/components/game/Game.tsx
index f9fb787..f74bdf9 100644
--- a/src/components/game/Game.tsx
+++ b/src/components/game/Game.tsx
@@ -6,18 +6,21 @@ import VillageView from "@/components/game/VillageView";
 import { engine, effectiveRate, activeRecipe, fullnessPenalty } from "@/lib/game/engine";
 import {
   APTITUDE_LABEL,
+  BREEDS,
   HALL_LEVELS,
   KITCHEN_BUILD_COST,
   KITCHEN_MEAL_CAP,
   PASSIVES,
   TOOL_IMG,
 } from "@/lib/game/data";
+import type { AptitudeKey } from "@/lib/game/types";
 import type { Building, Cat, GameState } from "@/lib/game/types";
 
 export default function Game() {
   const { state, dispatch } = useGame();
   const [selectedCatId, setSelectedCatId] = useState<string | null>(null);
   const [message, setMessage] = useState<string | null>(null);
+  const [candidates, setCandidates] = useState<Cat[] | null>(null);
 
   if (!state) {
     return (
@@ -36,10 +39,21 @@ export default function Game() {
     <div className="space-y-8">
       <TopBar
         state={state}
-        onAdopt={() => run(() => engine.adopt())}
+        onAdopt={() => setCandidates(engine.generateCandidates())}
         onUpgrade={() => run(() => engine.upgradeHall())}
       />
 
+      {candidates && (
+        <AdoptModal
+          candidates={candidates}
+          onPick={(cat) => {
+            run(() => engine.adoptCandidate(cat));
+            setCandidates(null);
+          }}
+          onClose={() => setCandidates(null)}
+        />
+      )}
+
       <VillageView />
 
       {message && (
@@ -96,6 +110,128 @@ export default function Game() {
   );
 }
 
+/** 패시브 스킬 배지 — 마우스오버 시 상세 툴팁 */
+function PassiveBadge({ passiveKey }: { passiveKey: string }) {
+  const def = PASSIVES.find((p) => p.key === passiveKey);
+  if (!def) return null;
+  const color =
+    def.kind === "positive"
+      ? "bg-green-50 text-green-700 dark:bg-green-950 dark:text-green-300"
+      : def.kind === "negative"
+        ? "bg-red-50 text-red-600 dark:bg-red-950 dark:text-red-300"
+        : "bg-purple-50 text-purple-700 dark:bg-purple-950 dark:text-purple-300";
+  const kindLabel =
+    def.kind === "positive" ? "긍정" : def.kind === "negative" ? "부정" : "복합";
+  return (
+    <span className={`group relative cursor-help rounded px-1.5 py-0.5 text-[11px] ${color}`}>
+      {def.name}
+      <span className="pointer-events-none absolute bottom-full left-0 z-20 mb-1.5 hidden w-48 rounded-lg bg-gray-900 px-3 py-2 text-left text-[11px] leading-relaxed text-white shadow-lg group-hover:block dark:bg-gray-700">
+        <span className="mb-0.5 block font-semibold">
+          {def.name} <span className="font-normal opacity-70">({kindLabel})</span>
+        </span>
+        {def.desc}
+        <span className="absolute left-3 top-full border-4 border-transparent border-t-gray-900 dark:border-t-gray-700" />
+      </span>
+    </span>
+  );
+}
+
+/** 입양 모달 — 후보 3마리 중 1마리 선택 */
+function AdoptModal({
+  candidates,
+  onPick,
+  onClose,
+}: {
+  candidates: Cat[];
+  onPick: (cat: Cat) => void;
+  onClose: () => void;
+}) {
+  return (
+    <div
+      className="fixed inset-0 z-50 flex items-center justify-center bg-black/50 p-4"
+      onClick={onClose}
+    >
+      <div
+        className="max-h-[90vh] w-full max-w-3xl overflow-y-auto rounded-2xl bg-white p-6 shadow-2xl dark:bg-gray-900"
+        onClick={(e) => e.stopPropagation()}
+      >
+        <div className="mb-4 flex items-center justify-between">
+          <h2 className="text-xl font-bold">😻 입양할 고양이를 선택하세요</h2>
+          <button
+            onClick={onClose}
+            className="rounded-lg px-3 py-1 text-gray-400 hover:bg-gray-100 dark:hover:bg-gray-800"
+          >
+            ✕
+          </button>
+        </div>
+        <div className="grid gap-4 sm:grid-cols-3">
+          {candidates.map((cat) => {
+            const breed = BREEDS.find((b) => b.key === cat.breed);
+            const aptitudes = (Object.keys(APTITUDE_LABEL) as AptitudeKey[]).filter(
+              (k) => cat.aptitude[k] > 0,
+            );
+            return (
+              <div
+                key={cat.id}
+                className="flex flex-col rounded-xl border border-gray-200 p-4 dark:border-gray-700"
+              >
+                <div className="mb-2 text-center">
+                  <div className="text-4xl">{cat.emoji}</div>
+                  <div className="mt-1 font-bold">{cat.name}</div>
+                  <div className="text-xs text-gray-400">
+                    {cat.breedName}{" "}
+                    <span className="text-amber-400">
+                      {"★".repeat(breed?.rarity ?? 1)}
+                    </span>
+                  </div>
+                </div>
+
+                <div className="mb-2 rounded-lg bg-gray-50 px-3 py-2 text-xs leading-relaxed dark:bg-gray-800">
+                  💪 근면 {cat.stats.diligence} · ❤️ 체력 {cat.stats.stamina} · 🍽️
+                  식욕 {cat.stats.appetite}
+                </div>
+
+                <div className="mb-2 flex flex-wrap gap-1">
+                  {aptitudes.length > 0 ? (
+                    aptitudes.map((k) => (
+                      <span
+                        key={k}
+                        className="rounded bg-sky-50 px-1.5 py-0.5 text-[11px] text-sky-700 dark:bg-sky-950 dark:text-sky-300"
+                      >
+                        {APTITUDE_LABEL[k]} {cat.aptitude[k]}
+                      </span>
+                    ))
+                  ) : (
+                    <span className="text-[11px] text-gray-400">적성 없음…</span>
+                  )}
+                </div>
+
+                <div className="mb-3 flex min-h-6 flex-wrap gap-1">
+                  {cat.passives.length > 0 ? (
+                    cat.passives.map((key) => <PassiveBadge key={key} passiveKey={key} />)
+                  ) : (
+                    <span className="text-[11px] text-gray-400">패시브 없음</span>
+                  )}
+                </div>
+
+                <button
+                  onClick={() => onPick(cat)}
+                  className="mt-auto rounded-lg bg-orange-500 py-2 text-sm font-semibold text-white hover:bg-orange-600"
+                >
+                  이 아이로 할래요
+                </button>
+              </div>
+            );
+          })}
+        </div>
+        <p className="mt-4 text-center text-xs text-gray-400">
+          한 마리만 선택할 수 있어요 · 능력치와 패시브에 마우스를 올리면 상세 정보가 보입니다
+        </p>
+      </div>
+    </div>
+  );
+}
+
 function TopBar({
   state,
   onAdopt,
@@ -335,25 +471,9 @@ function CatCard({
 
       {cat.passives.length > 0 && (
         <div className="mt-2 flex flex-wrap gap-1">
-          {cat.passives.map((key) => {
-            const def = PASSIVES.find((p) => p.key === key);
-            if (!def) return null;
-            const color =
-              def.kind === "positive"
-                ? "bg-green-50 text-green-700 dark:bg-green-950 dark:text-green-300"
-                : def.kind === "negative"
-                  ? "bg-red-50 text-red-600 dark:bg-red-950 dark:text-red-300"
-                  : "bg-purple-50 text-purple-700 dark:bg-purple-950 dark:text-purple-300";
-            return (
-              <span
-                key={key}
-                title={def.desc}
-                className={`rounded px-1.5 py-0.5 text-[11px] ${color}`}
-              >
-                {def.name}
-              </span>
-            );
-          })}
+          {cat.passives.map((key) => (
+            <PassiveBadge key={key} passiveKey={key} />
+          ))}
         </div>
       )}
 
diff --git a/src/lib/game/engine.ts b/src/lib/game/engine.ts
index ff9da3e..9c45dea 100644
--- a/src/lib/game/engine.ts
+++ b/src/lib/game/engine.ts
@@ -243,10 +243,17 @@ export const engine = {
     state.updatedAt = Date.now();
   },
 
-  adopt(): string | null {
+  /** 입양 후보 생성 (아직 마을에 합류하지 않음) */
+  generateCandidates(count = 3): Cat[] {
+    return Array.from({ length: count }, () => generateCat());
+  },
+
+  /** 후보 중 한 마리 입양 확정 */
+  adoptCandidate(cat: Cat): string | null {
     if (!state) return null;
-    if (state.cats.length >= state.hall.capacity) return "수용 인원이 가득 찼습니다 (회관 증축 필요)";
-    state.cats.push(generateCat());
+    if (state.cats.length >= state.hall.capacity)
+      return "수용 인원이 가득 찼습니다 (회관 증축 필요)";
+    state.cats.push(cat);
     return null;
   },