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A letter arrives at Death Cram School. Inside is an invitation to a spa resort. While Yumi declares to the four excited girls that, "This is evil itself," and points out that they are slacking off too much. After losing a game of boob rock-paper-scissors, however, the five kunoichi go to the resort. There, the five girls from Hanzō Academy, Homura Crimson Squad, and Hebijo Clandestine Girls' Academy also come, but decide to call a temporary truce. However, a trivial matter sets off a sour quarrel and they settle it with a showdown in the style of the ancient shinobi.