三代目瀬名垣組組長の孫娘、瀬名垣一咲。
高校ではフツーに友達を作ってフツーに恋がしたい！
地元から離れた高校へ入学したけど、過保護な若頭・宇藤啓弥が
年齢詐称して一咲の高校に裏口入学！？
「恋愛なんて一咲さんには早すぎます」と訴え、男を近づけない気満々の啓弥。
だけど、実は一咲はずっと前から啓弥に片想いしていてー！？

Isaku Senagaki is the granddaughter of the third-generation boss of the Senagaki yakuza family.
As a high school student, Isaku just wants to make friends and fall in love like everyone else.
She enrolls in a high school far away from her hometown, but Keiya Uto, an overprotective lieutenant of the yakuza family, lies about his age to get into the same school!
Claiming that Isaku is not ready for romance, Keiya is prepared to do anything to keep boys away from her.
But it turns out that Isaku has had a crush on him for ages!