Mori and Akutagawa end un in the same room during a business trip and there's only one bed, so they have to share it. Akutagawa also happened to need another pillow to sleep with, which he didn't have.

Gin finds out that Akutagawa and Mori are dating and she's not so happy about it. She decides to spend a dinner with them and see if Mori is worthy of being with Akutagawa. The thing is that Akutagawa doesn't understand why was like that.