well from how i understand is that, yichan tried to kill him and seme said somethinf about yichan bothering him and by that i’m prolly guessing that he was annoying him with shit like “you’ll pay for what u did to my brother!” or sum type of shit. i’m pretty sure they were together before seme killed his older brother and now yichan is with seme’s older sister because they both wanted to make him feel shitty

I was confused was Yichen his ex or not? Like how did he date him after the Seme killed his friends and brother? Also when Seme said he had no experience, what was Yichen then? And why is Yichen with his sister now?