magnum's manga / #ED(2)

Main character's friend and girlfriend start dating each other. MC finds new friend in class. Develops a relationship with him to find out that he is the unwanted child of a famous actress and who finds himself alone because of it. After they finally find happiness, news of her child scandal emerges and the mom and guy move to Hawaii, leaving MC behind. Side Story: Guy who develops ED after an accident as a child. Dates his best friend who unintentionally caused the accident.