Saisho Hajime

Sophomore at East School. A member of the swimming club. He is a mood-maker in his class. He is what is known as a "funny guy". He talks to girls in a light-hearted manner, which sometimes makes him look like a playful person.

His academic performance is not good, and he has to take remedial classes with Mizushima Asa during the summer vacation.

He is a little curious about Mizushima Asa, who is also a member of the swimming club.