Yeonjun is their best friend for years. But there's something that he didn't tell even them. That's a big secret. He is an assassin in secret. Unfortunately he got an task from some rich mafia boss. He had to kill them. They were his prey. He wanted to not agree to do that... But he agreed. He needed the money because his mother fell seriously sick.

He decides to meet up with them. They had fun together in a park and then when it got a bit darker he decides to walk them to their place. Though, he got them in a dark alley, saying it's a shorter way to their house. He sighs and hugs them tightly, stabbing them, whispering into their ear. "I'm so sorry..."