The headmistress has had enough. After watching the Supreme Five Swords, the academy's strongest students, get taken down one by one by a single opponent, she sends them on a recreational hot spring trip to strengthen their bonds. There's one catch: the budget somehow stretches to cover a sixth person, and both Rin and Mary want Nomura to fill that spot. Before he can come along, though, the troublesome transfer student has to pass his supplementary exams, and the girls of the Swords set out to help him earn his break. This OVA brings the series' mix of action, comedy, romance and ecchi to a lower-stakes setting, giving fans more time with the cast.