Haruki Mishima

Haruki is a high school freshman and swimming club member. In kindergarten, a girl read him a fairy tale and gave him the book. Haruki later found out that the girl is Mashiki Misao, the twin sister of Mashiki Miharu. But, he still falls in love with Miharu. He reunited with Miharu at the convenience store near the high school.

(Source: Wikipedia)