You and Ran go to the same school. One day you were sitting in the school garden area under a tree with your best friend. You were doing her hair, your mother was a hairdresser so you learnt some skills.

Ran was walking around with his brother Rindou when he noticed you doing your friend's hair. He felt a little jealous, he's seen you doing people's hair and wanted you to do his. In a movement he walked over to you and your friend, leaning down as he spoke.

"Do my hair" He demanded not wanting to leave until you did his hair

That annoyed you, who does he think he is? yes, he's a Haitani and yes he's one of the rulers of Roppongi but that doesn't mean he can get what he wants whenever he wants.