Ritsuko

Ritsuko-sensei is the swim teacher of the team of Yamaguchi, Mamoru and Yuki. She's shier than her friend and colleague Chinatsu. One day Yamaguchi brought a photo camera with him to the lesson in order to take pictures of her, but he was surprised by Chinatsu who firstly teased and blackmailed him, then she starts to erotically play with him. Meantime, Ritsuko showed a feeling toward him and spontaneously joined the two.