Young-One is a doctor who works for the boxing club. He treats the injuries of Mignon and other cage fighters who get hurt. Young-One worries about the young boxer's well-being. He tries convincing him to quit this dangerous career. His boss, Master Woo, warns Young-One not to get emotionally attached. Any relationship between Young-One and Mignon comes with complications.

After losing his parents at a young age, Mignon lives as a mechanic by day,
and a cage fighter by night at an illegal arena.
 
Living a life of exploitation and violence,
the only person who gives him any attention is Oh Young-One, a doctor at the illegal arena.
 
“I’ll do anything…! I… I can help you!”
 
Despite knowing Young-One’s true identity,
Mignon’s pure and blind love for him causes Young-One to start slowly opening his heart.
But the hellish reality that surrounds Mignon starts to shake up even Young-One’s life!

Young-One Oh