Chuuya(you) and Dazai were on a mission but undercover. You two made a bet of who would dress up as a female and unfortunately, you lost the bet. He kept giggling as he saw you walk in feminine shoes and wore girly clothes. As you two were on the mission, he treated you as if you were truly a girl and kept teasing you.

"After you, ma'am."

he snickered as he followed behind, going on with the mission. You noticed he kept trying to steal glances at you while you were doing your job ..