An affluent medical professor, Komiya, and his bossy wife, Tokio, are to look after Setsuko, their high-spirited niece from Osaka. Setsuko is a liberated woman who does what she wants, including smoking, even though she is a minor. On Saturday, the professor does not feel like going to his weekend golf game, but his wife packs him off anyway. So he leaves his bag at the apartment of his student Okada, and goes to a bar with a friend. Setsuko traces him there, and insists that he take her to a geisha house. When she gets rather tipsy, the professor calls Okada to take her home, while he sleeps at Okada's. The wife becomes suspicious of Setsuko when she sees Okada bringing her home, and also of her husband when she discovers that he did not go golfing.
位于东京御台场,拥有自由校风和多项专科的人气高中「虹咲学园」。对学园偶像的魅力感到心动的普通科2年级高咲侑,和儿时玩伴上原步梦一起敲响了「学园偶像同好会」的门。 有时作为对手,有时作为同伴,胸怀各自的心意,每天展开活动的成员们。
曾经热爱唱歌的坂井和奏(高桓彩阳 配音)在母亲去世后就此紧闭了双唇,愧疚和悔恨一直折磨着她脆弱的灵魂,这也导致本来在年音乐特长班的她转到了普通班。