We all have to face it that the best decision is to have Yui back to his papa. The dad begged Jiu to take care of Yui for the mean time and he already set the expectations that this will happen. It's not like he suddenly said he will get Yui. Jiu giving little info abt Jiu and avoiding to much contact makes it look like he want to unconsciously make the dad forget abt Yui. Yui will have to adjust and miss Kasei and Jiu but that's part of it. She has to be with her dad and her dad have to take responsibility of her. How could he possibly face her wife if he just left Yui like that. Jiu also need to let go of Yui so he can also concentrate on his new relationship with Kasei. He has to fix his lose ends and though unfair he have to accept the reality. And oh the comments say something bad will happen I hope not with the dad. Yui already lost his mom so it is v sad if she will lose dad too even though theyre not close,