Girls Bravo - Season 2 Episode 1 Bravo in the swimming pool
Overview: In an attempt to get close to Miharu, Fukuyama buys the school swimming pool, remodels it into a resort, and sends every boy but himself and (accidentally) Yukinari, tumbling out through a hole in the floor. And with the inadvertant help of Lisa's magic, he switches bodies with Yukinari.