In a society where lawless individuals with special abilities throw human society into chaos, there exists a handler who suppresses such lawlessness. One day, a high school student named Yujin encounters a handler named Jinhwa. Jinhwa proposes to Yujin to become a handler, and Yujin begins to walk the path of a hero as he takes Jinhwa's hand. However, a thorny road awaits Yujin as a handler, and Jinhwa decides to take on the pain and suffering on behalf of Yujin as an adult. "What will you do if you get hurt again?" "I'll protect you." Gradually, Yujin begins to open his heart to the kind Jinhwa, who always stands against violence in his place. "No matter what happens, I'll return to your side. I'll be by your side. It won't matter if you say you don't want it anymore."