In introduction,there was a teenage boy named Itsuki Nakamura who raised into an island.After his 18th birthday he was Separated and free,since its his family's tradition.He arrived on the city without any money( He need to start from nothing to prove that he is deserving to inheret his parent's wealth).He does not have knowledge about sympathy,feelings,and socializing.Could he survive?Someone will help him,who will help him?