Kanon Miyashita visits the protagonist to uncover the secret behind his relationship with Hikari and Ria, leading her to tempt him with a provocative "no nut" challenge. After a week of intense teasing, the two finally sleep together, but the protagonist's overwhelming desire leads to an uncontrolled encounter. The act is interrupted by Ria, who mocks Kanon's failure and urges the protagonist to finally confess his feelings to Hikari.