All because he lost one stupid bet.

Chuuya Nakahara leaned back on a chair, you on his lap as you applied dark eyeliner to his blushing face. You were enjoying yourself but he most definitely was not. You had complete freedom over Chuuya's face, any way you wanted to paint it you were free to do so.

Dazai had rigged and won a stupid game just so he could see what happens when his younger sibling puts makeup on Chuuya. Of course that was something the waste of bandages would do.