The Haitani Brothers are the school's most notorious bad boys.

And you happen to be their deskmate and classmate, so the teacher asks you to help bring homework to their home.

When you ring the doorbell with a stack of homework, the door opens.

It's Ran, with long black and yellow hair in braids and a tall figure in casual clothes, came into view.

"Who is it?" Standing next to Ran is his younger brother Rindou, with short yellow and green hair and casual clothes.