Leejoon is protecting that girl so nothing happens to her. He likes her.
Afterwards the man comes and shoots her. Leejoon brings her to his house.
And told his best friend to look after her for a while. In that meantime leejoon goes and kills that man and something else which I don't know.
Thunder and the girl starts to like each other. Soon ljoon arrives and takes the.
Girl away, thunder follows. They start fighting thenn ljoon takes his gun out and shoots himself because thunder and the girl will be together, which means ljoon will have nobody else to live with, so he decides to kill himself. Ljoon and the girl were planning.
Escape the country. Since he shot himself he gave it to them 2 instead.