Cheon Seju, had no choice but to join an organization to avenge his dead sister. After losing all hope in life, he meets a boy who reminds him of his younger sister and offers him a small act of kindness. If I had known that my light heart would become so heavy, I wouldn't have brought you with me. "I told you, you'll always come first......." His usually fierce gaze was different today. Cheon Seju's gaze was gentle, sweet, and persistent. "So take responsibility." Cheon Seju was my first in everything. He was the first person to ever reach out a hand to me and gaze upon me. Sejin only accepted the man's hand because he offered it first and only ever gazed upon him because he gazed upon him first. And that is how he fell in love with this sweet and affectionate man. Sejin realized that he no longer wanted to be separated from Cheon Seju. Wherever he goes, I'll go. "You are all I have left now......."