diff --git a/back/src/wos/wos.service.ts b/back/src/wos/wos.service.ts
index e9b1faf..069d7b3 100644
--- a/back/src/wos/wos.service.ts
+++ b/back/src/wos/wos.service.ts
@@ -41,8 +41,12 @@ export class WosService {
     return crypto.createHash('md5').update(raw).digest('hex');
   }
 
+  private now(): number {
+    return Date.now();
+  }
+
   async getPlayer(fid: string) {
-    const timestamp = Date.now();
+    const timestamp = this.now();
     const sign = this.makeSign(fid, timestamp);
 
     const response = await axios.post(
@@ -74,7 +78,7 @@ export class WosService {
   }
 
   private async acquireSession(fid: string): Promise<string> {
-    const timestamp = Date.now();
+    const timestamp = this.now();
     const sign = this.makeSign(fid, timestamp);
 
     const response = await axios.post(
@@ -84,12 +88,10 @@ export class WosService {
     );
 
     const setCookie = response.headers['set-cookie'];
-    let sessionValue = '';
-    if (setCookie) {
-      const found = setCookie.find((c: string) => c.toLowerCase().includes('session'));
-      if (found) sessionValue = found.split(';')[0];
+    if (setCookie && setCookie.length > 0) {
+      return setCookie.map((c: string) => c.split(';')[0]).join('; ');
     }
-    return sessionValue;
+    return '';
   }
 
   private async redeemOne(
@@ -97,7 +99,7 @@ export class WosService {
     code: string,
     session: string,
   ): Promise<{ success: boolean; message: string; err_code?: number }> {
-    const timestamp = Date.now();
+    const timestamp = this.now();
     const sign = this.makeSign(fid, timestamp);
 
     const response = await axios.post(
@@ -201,9 +203,50 @@ export class WosService {
       exists.name = name;
       exists.is_active = true;
       exists.is_expired = false;
-      return this.wosCouponRepo.save(exists);
+      await this.wosCouponRepo.save(exists);
+    } else {
+      await this.wosCouponRepo.save({ name, code, is_active: true, is_expired: false });
+    }
+
+    this.redeemCouponForAllUsers(code).catch((err) =>
+      this.logger.error(`신규 쿠폰 전체 지급 실패: ${err.message}`),
+    );
+
+    return this.wosCouponRepo.findOne({ where: { code } });
+  }
+
+  private async redeemCouponForAllUsers(code: string) {
+    const users = await this.wosUserRepo.find();
+    for (const user of users) {
+      const alreadyDone = await this.couponLogRepo.findOne({
+        where: { fid: user.fid, coupon_code: code, result_msg: In([SUCCESS_MSG, ALREADY_MSG]) },
+      });
+      if (alreadyDone) continue;
+
+      try {
+        const session = await this.acquireSession(user.fid);
+        const result = await this.redeemOne(user.fid, code, session);
+
+        const finalResult =
+          result.err_code === 40008
+            ? { success: true, message: ALREADY_MSG }
+            : result;
+
+        if (result.err_code === 40007) {
+          const coupon = await this.wosCouponRepo.findOne({ where: { code } });
+          if (coupon) await this.wosCouponRepo.update(coupon.id, { is_expired: true, is_active: false });
+          await this.couponLogRepo.save({ fid: user.fid, coupon_code: code, result_msg: '만료된 쿠폰' });
+          break;
+        }
+
+        await this.couponLogRepo.save({ fid: user.fid, coupon_code: code, result_msg: finalResult.message });
+        this.logger.log(`[${user.fid}] ${code} → ${finalResult.message}`);
+      } catch (err: any) {
+        this.logger.error(`[${user.fid}] ${code} 지급 실패: ${err.message}`);
+      }
+
+      await new Promise((r) => setTimeout(r, 1500));
     }
-    return this.wosCouponRepo.save({ name, code, is_active: true, is_expired: false });
   }
 
   async toggleCoupon(id: number, is_active: boolean) {
diff --git a/front/src/components/CouponManager.vue b/front/src/components/CouponManager.vue
index fe6cf69..ba12a48 100644
--- a/front/src/components/CouponManager.vue
+++ b/front/src/components/CouponManager.vue
@@ -48,7 +48,7 @@ const activeCoupons = computed(() => store.coupons.filter((c) => c.is_active &&
 
 async function add() {
   if (!newCode.value.trim()) return;
-  const code = newCode.value.trim().toUpperCase();
+  const code = newCode.value.trim();
   await store.addCoupon(code, code);
   newCode.value = '';
 }
diff --git a/front/src/stores/wos.store.ts b/front/src/stores/wos.store.ts
index c571e55..f7ae34b 100644
--- a/front/src/stores/wos.store.ts
+++ b/front/src/stores/wos.store.ts
@@ -60,6 +60,7 @@ export const useWosStore = defineStore('wos', {
         const { data } = await axios.post('/api/player', { fid });
         this.player = data;
         this.fid = fid;
+        localStorage.setItem('wos_fid', fid);
         await Promise.all([this.loadHistory(), this.redeemAll()]);
         this.status = 'idle';
       } catch (err: any) {
diff --git a/front/src/views/HomeView.vue b/front/src/views/HomeView.vue
index c3a12d4..74a80da 100644
--- a/front/src/views/HomeView.vue
+++ b/front/src/views/HomeView.vue
@@ -68,19 +68,28 @@ import CouponManager from '../components/CouponManager.vue';
 const store = useWosStore();
 const fidInput = ref('');
 
-onMounted(() => {
+onMounted(async () => {
   store.loadCoupons();
   store.loadSavedUsers();
+  const savedFid = localStorage.getItem('wos_fid');
+  if (savedFid) {
+    fidInput.value = savedFid;
+    await store.searchPlayer(savedFid);
+    store.loadSavedUsers();
+  }
 });
 
 async function searchPlayer() {
   if (!fidInput.value.trim()) return;
-  await store.searchPlayer(fidInput.value.trim());
+  const fid = fidInput.value.trim();
+  localStorage.setItem('wos_fid', fid);
+  await store.searchPlayer(fid);
   store.loadSavedUsers();
 }
 
 async function selectUser(fid: string) {
   fidInput.value = fid;
+  localStorage.setItem('wos_fid', fid);
   await store.searchPlayer(fid);
   store.loadSavedUsers();
 }