Three "idols" (romaji "idoru", meaning Japanese pop culture icons) move in with Ryuuichi. After that, life gets a lot more exciting.

Party 1
Ryuuichi has a dream about Urara, the "idol" (see explenation above), wakes up... And finds out, that they moved in!
Party 2
Ryuuichi is conscripted into a film shoot, falls into a pool and catches a cold. Urara provides 100 % organic mediation.
Party 3
Haruka, his senpai, conscripts him to lingerie shopping and then to a love hotel.
Party 4
Urara's grandfather has arrived, which complicates the situation.
Party 5
Urara and Ryuuichi flee from an aggressive fan, get into an elevator, and, suddenly, the electricity is cut! Sex ensues.
Party 6
Ryuuichi and his senpai Haruka go into a public bath with mixed bathing, Urara and her crew join. Catfight ensues.
Party 7
Urara us jealous... And hurt. Ryuuichi tries to comfort her in usual hentai-manga manner...
Party 8
Urara goes with Ryuuichi to an amusement park, but senpai is already there waiting for him.
Party 9
Ryuuichi can't swim, falls into water and, of course, one of his hotties does the "kiss of life".
Party 10
The truth about Ryuuichi's and Urara's is finally revealed!