Reiji has always been at the mercy of his childhood friend, Tsubomi Mochizuki, whose expressionless face makes it hard to tell what she's thinking.Suddenly, he asks her to be his sex practice partner because she has a boyfriend.Reiji, who likes Tsubomi, has no reason to refuse and practices sex with her.However, he has a personal rule that says, ``You can only kiss someone you like,'' and he won't let you kiss him.Reiji can't hide his emotions as Tsubomi has been expressionless for a long time, but she gradually learns pleasure and shows erotic voices and facial expressions...!
