Seunghun's definitely being immature ngl but considering the past and also that he doesn't know jintae's past I can't totally blame him. But yeah what he said was rude.
I feel like mok did something cuz in the present he has a bruise on his forhead but it wasn't there when nanjo was explaining what happened that's why nanjo said he also did something even more embarrassing.
Seunghun's definitely being immature ngl but considering the past and also that he doesn't know jintae's past I can't totally blame him. But yeah what he said was rude.