How to Make Friends with Karaoke

How to Make Friends with Karaoke (カラオケでの友達の作り方, Karaoke de no Tomodachi no Tsukurikata) is chapter eight of the Kōshiki Anthology Comic series. It is chapter eight of volume one. This chapter was done by Atto.

Summary
The Neighbor's Club are at a Karaoke Box called Big Eco. Yozora announces that they will now start the "Karaoke Training Workshop". kodaka questions what exactly that means and Sena states that she wanted to sing a recently released song anyway. Yozora hits Sena in the face; apparently for acting on her own. She says that karaoke is a battlefield and if that was a real fight, Sena would already be dead. Yozora begins handing out roles to the members. Kodaka is given tambourine as his role. He'll be the one to hit the tambourine while the others sing. Sena asks what her role should be and Yozora tells her that she can just sit at the back and sit like a triangle. The two complain about the roles they received but Yozora says that her decision is final and they begin a song. Yozora's voice becomes hoarse after the song and she decides to never go out to karaoke with others again and goes home.