My Classmate's a Sexy Actress, and Now We Live Together?!

Ryosuke Kamiya, a third-year college student, is paired up for a presentation with Ruka Someya, a classmate from his seminar whom he secretly finds cute. His joy is short-lived, however, as Ruka—claiming she's too busy with her part-time job—proves to be no help at all, leaving him to prepare for the presentation almost entirely on his own… While working at home, Ryosuke loses his concentration and starts browsing an adult video streaming site, only to be stunned by the sight of a sexy actress who looks exactly like Ruka…?!

Ryosuke tries to apologize again for what happened last night, but Ruka blackmails him with footage she'd secretly taken of him completely naked in his sleep. Her demand was that she be allowed to live in Ryosuke's spacious apartment. An unlikely living arrangement begins between a dull college guy and a sexy gyaru film star! The two start off with the shopping to get ready for their new life together. On the way back, Ruka brings up something that takes Ryosuke a bit by surprise…

Ryosuke's innocent question about situation-based adult films leads them to explore an old, disused university club building. Ryosuke and Ruka wander through the abandoned clubroom. It's a thrilling situation where they're all alone in a place where no one is likely to come, yet they might just get caught by someone! Ruka looks exasperated at Ryosuke, who can't help but get excited at the thought…

Ruka has gone out for a shoot. Ryosuke understands the logic that filming is just part of the job for an active adult film actress… yet the unease in his heart won't fade. He knows he shouldn't watch, but he can't take his eyes off Ruka in the video, and his unease only grows. When night falls and Ruka returns home after finishing her shoot, Ryosuke—who's been lost in thought all day—is exhausted and gaunt. This has Ruka worried, but unusually for Ryosuke, he initiates sex with her…