after this arc he goes to a tournament type thing to meet first girl. He meets her again but she can’t leave due to training or her new position. But before they separate they have sex as one last hurrah to their mutual feelings which they can put to rest.
And that’s where I ended my read because I decided it would be best to wait for the manhua to catch up. But from my speculation on how things progress he can now go on growing his feelings for princess, which I sure hope he does