Undead Pool aka Attack Girls' Swim Team vs. The Undead is a 2007 Japanese erotic horror film.
A lab mix-up accidentally swaps a vaccine with a virus that turns a high school full of students and teachers into flesh-eating zombies. But all is not lost: New student Aki discovers that the swim team is immune to the plague. With the school rampaged by ravenous monsters, the girls engage in an over-the-top orgy of gory violence to save the day. Sasa Handa, Yuria Hidaka and Hiromitsu Kiba star in this comic creature feature.