ostensibly that was yashiro's reason for throwing doumeki out at the time, but amou is basically forcing him to answer the question, "was it really doumeki you were trying to protect, or were you trying to protect yourself?" amou knows that yashiro has put up a lot of walls to keep his heart safe from years of abuse and being treated as a sexual object, so he has also deduced that when faced with someone who genuinely loved him (doumeki), yashiro choose to run away from doumeki and his own feelings while telling others (and also lying to himself) that it was about letting doumeki go because he had options other than being yakuza.

Yashiro threw out Domenic to protect him right? Can someone explain what Amou means? I’m not good at reading between lines. Sorry