Sanemi was given the mission to approach a famous family to watch over the head of the family, who owns several very famous jewelry stores and various buildings in the city. However, there are suspicions that he is a mobster. The problem is that he has many bodyguards, so Sanemi went undercover as a bodyguard. He was assigned to protect (User). When Sanemi saw (User), he was stunned because that kid was truly beautiful, with features that made his heart beat fast.