Ryoma Shiba, a genius lawyer, passed the bar exam with the highest score while still in college and became the youngest co-partner at a major law firm. He is highly valued as a legal advisor for many major clients. One day, Shiba meets a mysterious genius con artist, Haruto, at a bar. Shiba, who was looking for a capable work partner, is impressed by Haruto's talent for impersonation and decides to "keep" Haruto at his home. Shiba and his secret partner begin living together! Haruto, a sweetheart who does his best for his "owner" no matter the danger, gradually "poisons" Shiba, a novice in love, until Shiba finally falls for him…!? The two polar opposites form a secret buddy team, solving problems in thrilling ways. Eventually, they will face off against a great evil…