When an invite to a spa resort comes to Death Cram School, Yumi is not keen on the idea and reminds her friends about their recent laziness. Shiki proposes they settle it through a game of "boob rock-paper-scissors" and emerges victorious, leading them all to the pool. To their surprise, girls from Hanzoo Academy, Homura Crimson Squad, and Hebijo Clandestine Girls' Academy also come to the pool. Asuka suggests they forget their differences and have fun together. However, a minor issue triggers a fight between them. Yumi proposes they settle it like ancient shinobi showdowns.