Maburaho

Maburaho is a light novel series that received an anime adaptation which aired from 2003 to 2004.

The story follows Kazuki Shikimori, a second year student at the prestigious magic school, Aoi Academy. Set in a world where everyone can use magic, Kazuki is only able to use his magic eight times before he turns to ash. One day, Kazuki's life changes when it is revealed that he is descended from a line of world-famous magicians originating from both the East and West, and he has the potential to father the most powerful magician in the world. Suddenly three girls, Yuna, Kuriko and Rin enter Kazuki's life in order to obtain his valuable genes.

Episode 1
Kazuki's shirt is unbuttoned, and the eyecatch features him at the beach with the girls.

Episode 3
The male and female bathrooms are merged together.

Episode 5
The eyecatch features Kazuki wearing a swimsuit.