「アンラッキー世界大会があったら、多分優勝…」子どものころからなにかにつけて不運に愛される、森咲亜季。高校に入学してからもそれは絶賛継続中!!先輩の赤羽と徳永にハメられ、園芸部に強制入部。さらに、その園芸部とは仮の姿…正体はなんと闇金部!!教師も手を焼くキケンなイケメン先輩に囲まれて不運満喫な高校生活…だけど、いつしか芽生える不思議な気持ち。まったくタイプの異なる3人がお互いを成長させていく、青春グラフィティ!!イヤイヤだけど、イヤじゃない。

Ever since he was a kid, Morisaki Aki has been loved by the spirit of misfortune. And it's continued, even after he started high school! He is then coerced by his upperclassmen, Akabane and Tokunaga, into joining the gardening club. But as it turns out, that was just a cover for... the Loan Shark Club! He gets involved with upperclassmen that not even the teachers would want to cross. And thus begins his unfortunate high school life. However, unbeknownst to him, mysterious feelings begin to bloom. These three guys with their clashing personalities grow together to paint a bold graffiti tag of teenage angst!