diff --git a/nekoyume/Assets/_Scripts/UI/Module/WorldBoss/WorldBossReward.cs b/nekoyume/Assets/_Scripts/UI/Module/WorldBoss/WorldBossReward.cs
index 7ebb6edc02..859d4d0eae 100644
--- a/nekoyume/Assets/_Scripts/UI/Module/WorldBoss/WorldBossReward.cs
+++ b/nekoyume/Assets/_Scripts/UI/Module/WorldBoss/WorldBossReward.cs
@@ -108,6 +108,12 @@ protected void Awake()
                 var preRaiderState = WorldBossStates.GetPreRaiderState(avatarAddress);
                 foreach (var notification in notificationsSeasonReward)
                 {
+                    if (preRaiderState is null)
+                    {
+                        notification.SetActive(false);
+                        return;
+                    }
+
                     notification.SetActive(!isOnSeason && !preRaiderState.HasClaimedReward);
                 }
             });
diff --git a/nekoyume/Assets/_Scripts/UI/Module/WorldBoss/WorldBossSeasonReward.cs b/nekoyume/Assets/_Scripts/UI/Module/WorldBoss/WorldBossSeasonReward.cs
index f46879711c..544b372d51 100644
--- a/nekoyume/Assets/_Scripts/UI/Module/WorldBoss/WorldBossSeasonReward.cs
+++ b/nekoyume/Assets/_Scripts/UI/Module/WorldBoss/WorldBossSeasonReward.cs
@@ -1,4 +1,5 @@
-using System.Linq;
+using System;
+using System.Linq;
 using Nekoyume.Blockchain;
 using Nekoyume.Helper;
 using Nekoyume.L10n;
@@ -59,19 +60,21 @@ public void Set(WorldBossState worldBossState, RaiderState raider, int raidId, b
             var tableSheets = Game.Game.instance.TableSheets;
             var contributeSheet = tableSheets.WorldBossContributionRewardSheet;
             var contributeRow = contributeSheet.Values.FirstOrDefault(r => r.BossId == raidRow.BossId);
-            if (contributeRow == null)
+            if (contributeRow == null || worldBossState == null)
             {
-                NcDebug.LogError($"Not found WorldBossContributionRewardSheet for bossId: {raidRow.BossId}");
+                NcDebug.LogError($"Not found WorldBoss Data: {raidRow.BossId}");
                 return;
             }
             rewardItem.Set(contributeRow);
 
+            var worldBossTotalDamage = worldBossState.TotalDamage;
+            worldBossTotalDamageText.text = $"{worldBossTotalDamage:N0}";
+
             if (raider == null)
             {
                 claimButton.SetCondition(() => false);
                 claimButton.UpdateObjects();
 
-                worldBossTotalDamageText.text = "0";
                 userTotalDamageText.text = "0 (0%)";
 
                 foreach (var rewardItemView in rewardItems)
@@ -85,10 +88,7 @@ public void Set(WorldBossState worldBossState, RaiderState raider, int raidId, b
             claimButton.SetCondition(() => canClaim);
             claimButton.UpdateObjects();
 
-            var worldBossTotalDamage = worldBossState?.TotalDamage ?? 0;
-            var userTotalDamage = raider?.TotalScore ?? 0;
-
-            worldBossTotalDamageText.text = $"{worldBossTotalDamage:N0}";
+            var userTotalDamage = raider.TotalScore;
             float ratio = 0;
             if (worldBossTotalDamage > 0)
             {
@@ -113,7 +113,7 @@ public void Set(WorldBossState worldBossState, RaiderState raider, int raidId, b
                 if (!string.IsNullOrEmpty(currentItem.Ticker))
                 {
                     var amount = (decimal)currentItem.Count * (decimal)ratio;
-                    if (amount <= 0)
+                    if (Math.Floor(amount) <= 0)
                     {
                         continue;
                     }