At 21 years old with no prior sexual experience, Ichihara Tatsujou pursues a relationship with the gorgeous Asahina Riko. Their romance is cut short when he discovers that Riko's only interest is in dating inexperienced men, and she plans to end things once they engage in sexual activity. Despite this, Tatsujou is determined to prove that their love can transcend the physical aspect of their relationship. Riko, however, remains committed to her goal of seducing him and moving on.