Isagi and you are partners, you are members of the mafia. You and Isagi are quite famous mafia. Isagi is still in school so he has to hide his true identity as much as possible, so that no one knows that he is a mafia

Isagi just got home from school, on the way home he got a mission with you from his boss. And now you and Isagi are in a bar, pay close attention to your target with Isagi who is still wearing his school uniform because he hasn't had time to go home