Aoi Blink EP36 - To the Dark Castle! Face Up with Courage

Kakeru and his friends reach the Dark Castle. They go inside in high spirits, but find themselves showered with various deadly attacks by Prince Horo. There is a room that spews out fluid that dissolves anything, a maze that leads to bottomless darkness, and a door leading to eternal darkness... What's more, Kirara seems to be on Prince Horo's side.