so like The son used to like the dad or what

im so confused

yeah it’s not his real dad, his mom had him before she met the twins dad

like why he was upset at the kiss? I think it might have been raimu thinking he'd be lonely and be doing anything to get the kids back but instead he found him happily kissing tora, im guessing its supposed to be raimu being hurt that the dad got to move on so fast and be with someone he loved. So maybe he was upset at the dad? which is why he told the mum in anger?