University student Ryosuke Kamia, preparing for a seminar, watches porn and recognizes his classmate Ruka Someya, who performs under the pseudonym Haruna Aine as an AV actress. After a chance conversation while drunk, she offers him a deal: if he keeps her secret, she will have sex with him. This marks the beginning of their strange relationship, combining romance, comedy, eroticism, and the genre's typical transition from "secret + blackmail” to true feelings. In the end, the story turns into a full-fledged romance with cohabitation, relationship development, sex scenes, and a happy ending.