小川利明

A male student in Fusae's class and younger brother of Yoshimi. Contrary to his sister, he is serious and quiet, but not indecisive and has a strong psyche. He is hungry for motherhood due to the absence of his mother. Because of this, he is fond of Fusae from the beginning. (She is one of the few students who likes Fusae.) Fusae also thinks that the serious Toshiaki is a good student. His personality is somewhat similar to Yoshio's, but he is a beautiful, young, cute, obedient, and protective. Despite his appearance, he has a large penis and is good at sex as well. He also ejaculates a lot because he is young. [From official site]