Ume drops by the student council room as he takes care of something early in the morning. He then finds a young girl covered in blood slumped over a desk! And it seems the girl has become quite attached to Ume!?

When Ume gets home, he finds a suspicious figure—who turns out to be none other than his sister, Sho Mizunoe! Sho, Arisu, and Komaro engage in a who-knows-Ume-more one-upping battle. What's going on here!?

The student council receives a complaint from the British tea ceremony club that the nearby music club is too noisy. It's not the instruments causing the noise, but something a bit more sensual!?

Ume and Tan sneak around to study Arisu, whose true nature remains a bit of a mystery. When they see an opening and rummage through Arisu's things, she suddenly comes back out of nowhere! What are they going to do now!?

As a thank-you for their help, the student council joins the British tea ceremony club for one of their activities. Hisako finishes up in the restroom, and she tries to go back to her seat but is unable to open the toilet stall door!?