Demelu san

The knife twists at the thought That I should fall short of the mark...

505 - Arctic Monkeys

DETECTIVE HUSBANDS 🚔

GANGSTER HUSBANDS 🚬

JUDGE HUSBANDS 🎓

AND THEN tried to blow up his mentor along with himself.

AND THEN was going to help Kang Yohan kill all those people and die with him.

The man is canonically NOT against killing people.

At best, he tried to pretend like he was because he knew that he should be, and that's what the people in his life expected of him. He only gets upset about killing and people dying when it affects his relationships with other people and the way that they see him. Once he no longer has to pretend for Professor Min or Soohyun, he doesn't even try to act like he's bothered by it.