Hisashi Yoshizumi

Hisashi Yoshizumi ( 吉住 久志 Yoshizumi Hisashi) is the protagonist of Imouto de Ikou!

Background
Hisashi is a third-year student at Sakakino Seiryou. Having lost his mother in childhood, he has become close with his father, having decided to spend time with him.

Personality
He is described as having a calm personality. He also appears to be somewhat observant, noticing strange changes in his father's behavior after Mayuka and Seika's arrival.

Etymology

 * His given name Hisashi ( 久志 ) consists of "duration of time" ( 久 ) and "resolve" ( 志 ).
 * Given the pattern of 0verflow characters being surnamed after Japanese politicians, Hisashi might be surnamed after Kenichi Yoshizumi, who is the current mayor of Shinjuku.

Trivia

 * Hisashi is the second 0verflow protagonist to not have any relation to Tomaru Sawagoe, the first being Shou Furuya of PureMail Gaiden. They also share this distinction with:
 * Shuuhei Toono of Lost M
 * Yuuki Ashikaga of Cross Days.
 * In the visual novel, Hisashi's eyes are blue, whereas in the OVA, they're green.