Omake Gif Anime - Kaguya-sama wa Kokurasetai - Episode 6 - Chika Releases Knife

Chika showed Miyuki how the prop knife stayed in her chest. I think more than springs are involved.

Introducing the paranoid and nervous Ishigami the Treasurer while Kaguya was dressed in costume for a horror play was not good for his heart.

Chika asked some pop psychology questions which are supposed to reveal how a person feels about love and marriage and everyone pretty much got the answers they wanted. Except for Ishigami.

Hayaka, Kaguya's maid, impersonates (maybe) a flashy girl at school. She convinced Kaguya to add a little glamour to her nail polish by saying it would definitely get some compliments from Miyuki. Almost!