basically jun went to yohan's place and yohan's family was ignoring yohan so jun thought it'd be a good idea to invite yohan downstairs so all of them could have dinner together with yohan since he didn't want him to be left out but unfortunately he was alienated by his own family and that led to him taking his anger out on jun for doing something on his own will when he didn't even ask him to then they were fighting and yohan started to sexually assault jun then jun got scared and threw something a yohan that left him injured then he ran away and now their on bad terms

I read this awhile ago and re picked it up but i totally forgot why he is mad and what was the misunderstanding that lead to yohan being an abolute dick?