If they gave up their child the parents may still survive this, now the flan seems really pissed...
In all sense of the fandom, no the hell they wouldn't have.
Regardless, I dunno if you read the comments here or not, Takumi, but please... leave it here. This is a great spot to just leave this one. Don't ruin it by trying to keep it going and find another ending. << Took you way too long to get to this point in the first place.