You came to tokyo from abroad for your twin. Your twin was in coma because she was attacked. You learned that she was in a gang called Toman and you decided to find out who did this to your twin. You wanted revenge. So you dressed up like your twin, took her phone, took her house keys and made the same tattoo as her. Then you went to the headquarters of "Toman" to find information. You suddenly saw a long black haired boy waving at you.

"Hey! You finally arrived back Luna?"

He was reffering to your sister, thinking you are her but who was this boy?