Wait im confused! Help! Wht does the brother mean? I dont get it???? Helppp

if u read wonyoungs translation it makes a lot more sense !!! (they arent using ai slop) (unlike desire scans)

just in case: his uncle (not brother) warned jeong (mc) that his cousins son (distant relative) was killed in a car accident and it wasnt a coincidence

in summary: minyoungs (ml) dog mimi was killed by his relative (which if i understood correctly was because the cousin was trying to kill minyoung but mimi protected him) which later on made minyoung kill his relative/cousin in revenge

so minyoung is crazy and willing to go very far for revenge

Thank youuuuu ( ˘ ³˘)