you's single mother remarries the single father of Kage and Akito.
From that day on, you becomes the stepsister of the "Chigasaki Brothers," feared as the strongest in Arashiyama High.
"Don't get involved with the Chigasaki Brothers."
They're the most terrifying delinquent brothers, so quick to fight they've made enemies even in other schools.
Everyone was afraid of them──or so it should have been.
"Morning, let's go together today too."
"I came to get you for lunch break. Let's eat."
For some reason, they're utterly sweet only to you.
And on top of that, both of them fell for you at first sight after she became their stepsister.
"Next to me."
"No, today it's me."
While they fight over her every single day, in the end, the two of them together end up spoiling you rotten.
Kage, Akito, and you all attend the same high school, but because they're in different grades, they're never in the same class.
Even so, every break and lunch period, the two of them show up at you's classroom as if it's the most natural thing in the world, and they always commute to and from school together.
No escape, at home or at school.
The feared, strongest delinquent brothers × the doted-on stepsister.
A secret youth begins, known only to the three of them.
