Kyohei, an unpopular college student, is struggling again at a matchmaking party. Even when bringing up his only boast—being cousin to the popular male idol, Ren Arisugawa —people just think he is lying... Returning to his apartment feeling empty and alone, he finds Ren waiting for him at the door. He decides to hide Ren, who seems to be in some kind of trouble, at his place. But the body he saw in the bathroom was unmistakably that of a woman...!?

Having learned Ren's secret, Kyohei is ordered by manager, Satsuki, to accompany her on work. Kyohei immediately joins Ren for a live broadcast promoting the drama. Ren was scheduled to appear alongside Momoka from the idol unit “Haru x Momo.” However, after speaking with Haruna, the other member of the unit, Ren and Kyohei somehow find themselves locked in a room at the TV station...

Kyohei is confronted by Satsuki after she discovers he crossed the line with Ren. Hearing the reason Ren cross-dresses leaves Kyohei with mixed feelings, but a misunderstanding occurs when Ren sees him being pestered by a drunken Satsuki. Ren impulsively flees the scene and heads home alone. Ren becomes upset, but someone creeps up behind her...

Though the ghostly disturbance troubling Ren had been resolved, she continues staying at Kyohei's place until her new residence was settled. Kyohei had officially become Ren's attendant, but accidentally wanders into idol, Momoka's dressing room. Though Momoka is usually polite and adorable, her attitude suddenly changes...

As Satsuki suggested, Kyohei goes on a date with Ren in her girl form. Though Ren feels uneasy and fidgets about going out in her girl form, Kyohei, seeing Ren's cute appearance, finds himself more conscious of her than usual. Seeing Ren, who is not only cute but also defenseless, Kyohei finds himself wanting to touch her despite being in public...

One evening, while Kyohei and Ren were at home, the doorbell rings. Kyohei panics upon seeing a beautiful girl, Hina, standing at the entrance with a smile. Ren is shocked to hear about Kyohei and Hina's past relationship. Feeling inferior when comparing herself to Hina, Ren runs out of Kyohei's house...

After Ren runs away, Kyohei now has Hina camped out in his place. Though told he doesn't have to do his assistant duties anymore, he still can't stop worrying about Ren. Just as Kyohei feels utterly helpless, Hina presses him about getting back together again...

Led by Hina, Kyohei and Ren end up going to karaoke together. Unaware that Ren is a girl or of her feelings for Kyohei, Hina innocently clings to Kyohei right in front of Ren. Watching Hina freely seduce Kyohei, Ren finally loses it and has an emotional outburst...