Responses

their dad happened to commit adultery with another man and left them, and their mother i think committed suicide. that's what i understand from what i've seen and read.

here's some explanation
http://www.mangago.zone/read-manga/secret_xxx/sa/21401b98c49a8d5589a1f228bf859130_chapter-4/pg-21/
but looks like father's lover killed him later because of money issues
Can anyone explain to me what happened in Minato's (and his brother's) past?? Didn't get that part, at all!