diff --git a/campaign/event_20200521_en/a1.py b/campaign/event_20200521_en/a1.py
index ed452dac4..3523049b5 100644
--- a/campaign/event_20200521_en/a1.py
+++ b/campaign/event_20200521_en/a1.py
@@ -13,6 +13,7 @@ MAP.map_data = '''
     -- ME -- -- ++ ME -- ME --
     SP -- -- ME ++ -- ME -- MB
 '''
+MAP.camera_data = ['D1', 'D3', 'F1', 'F3']
 
 class Config:
     POOR_MAP_DATA = True
@@ -25,6 +26,12 @@ class Config:
 
     TRUST_EDGE_LINES = True
 
+    INTERNAL_LINES_HOUGHLINES_THRESHOLD = 40
+    EDGE_LINES_HOUGHLINES_THRESHOLD = 40
+    COINCIDENT_POINT_ENCOURAGE_DISTANCE = 1.5
+    MID_DIFF_RANGE_H = (140 - 3, 140 + 3)
+    MID_DIFF_RANGE_V = (143 - 3, 143 + 3)
+
     INTERNAL_LINES_FIND_PEAKS_PARAMETERS = {
         'height': (80, 255 - 40),
         'width': (0.9, 10),
@@ -42,3 +49,8 @@ class Config:
 class Campaign(CampaignBase):
     MAP = MAP
 
+    def handle_boss_appear_refocus(self):
+        if self.battle_count == 4:
+            self.map_swipe((-3, -2))
+
+        return super().handle_boss_appear_refocus()
diff --git a/campaign/event_20200521_en/b2.py b/campaign/event_20200521_en/b2.py
index f8a088fbe..9d3b321dc 100644
--- a/campaign/event_20200521_en/b2.py
+++ b/campaign/event_20200521_en/b2.py
@@ -74,5 +74,5 @@ class Campaign(CampaignBase):
         return self.battle_default()
 
     def battle_5(self):
-        return self.clear_boss()
+        return self.fleet_2.clear_boss()
 
diff --git a/campaign/event_20200521_en/b3.py b/campaign/event_20200521_en/b3.py
index c1d2dd764..7b5c9c5f0 100644
--- a/campaign/event_20200521_en/b3.py
+++ b/campaign/event_20200521_en/b3.py
@@ -82,6 +82,6 @@ class Campaign(CampaignBase):
         return self.battle_default()
 
     def battle_5(self):
-        return self.clear_boss()
+        return self.fleet_2.clear_boss()