You can tell Seungho is trying, but he still sounds demanding. I think that's because he doesn't even know how to be nice. He's never had the need to. He's used to having everything and everyone he wants.
But Nakyum is different for him, he realized that what he really wants is his love.
I think he's genuine but he doesn't know how to express himself. When he threw Nakyum in the bathtub, he was trying to be playful but he was still rude. I think he'll gradually learn how to be more gentle and treat Nakyum the way he deserves.
I'm excited to see how their dynamic changes from now on. I hope Nakyum realizes the power he holds over Seungho.
I think from now on we will see their relationship getting stronger and stronger, but others will try to separate them (Min, Jihwa, Inhun, Noona, Father). I think this will turn into Seungho and Nakyum against the world!