Sukisho! (2005)

Sora Hashiba is the main protagonist of the Sukisyo series. He is a high-school student and part of the "School-Do-It-All's" club, the Jack Of All Trades, which he and Sunao Fujimori were dragged into by their friend Matsuri Honjou. He has a second personality inside of him named Yoru, which he created when he was a child in order to help him endure the painful tests run by Aizawa.