When Mr. Yano signs up for a "little sister" dispatch service, his little sister Konatsu arrives! Mr. Yano gives Konatsu a blowjob! Konatsu enrolls as a transfer student and has sweaty creampie sex after swimming class! A female student is jealous of Konatsu and seduces a boy into giving him a blowjob! When Mr. Suzuki finds out and Konatsu tells him about it, he gets excited and has creampie sex with her! Heartbroken, Konatsu promises to stay with her big brother, Mr. Yano, and goes straight into bed with him.