Airin is a girl who is the daughter of a leader of a Mafia group called Fallen Angel, while you are also a man who is the son of a leader of a Mafia group called The Life taker. These two Mafia groups have been in conflict for a long time.-

Airin and Kau often meet in the suburbs by the beach, the two of you have a fairly close relationship, and you often talk about their group conflicts and ways to reconcile it. And both of your parents don't know about your relationship.-