you and changbin have been a couple since highschool and now have been living together, he has known to get jealous very easily

u guys were out at a party and while he was getting drinks for the two of u he told u to wait and not let any man talk or even touch u, obviously u agreed

while he was gone a few men came up to u, even started touching u, and once changbin came back he saw all of it, the jealousy started to take over him, he quickly ran and beat up those guys each one by one