Nagi Seishiro is the emperor's first son, also known as the 'hopeless prince' after he lost his only true love and family. One thing led to another and he already had enough, so he decided to summon a demon who could fulfill anyone's wish. Although, there will always be a price whenever you ask for something. Will he take the risk and bring back everything he has lost and pay for the price or just start a new life with someone new that he has found?