Kanon, a friend of Hikari and Ria, discovers the protagonist's secret and challenges him to a week of abstinence in exchange for a sexual reward. After days of intense teasing, the two eventually sleep together, but the protagonist's pent-up desire leads to an uncontrolled, raw encounter. The act is interrupted by Ria, who mocks Kanon for underestimating the protagonist's drive and urges him to finally confess his feelings to Hikari.