Cast from O nēsan no ONANIE

Mana Kunimi

Mana Ogura

Haruka Shibata

Yumi Kasahara

Akira Osaka

Kimoto Yukari

Junk Saito

Kazuo, the middle brother

Kazuho Hiramoto

Ario, the youngest brother

Ryo Kurihara

Michio, the oldest brother