[He did have it planned out in his head. What he'd say. How he'd say it. But all of that unfortunately went right out of the window the moment Kaeya walked into the house. Diluc is entirely winging it right now and just hoping it makes sense.]

... Mmn. You know me, you make me the happiest I've ever been, and that's why--

[That's why--

He closes the distance between them and takes Kaeya's left hand with his free one. He squeezes it, rubs his thumb over the other man's knuckles, then kneels down next to the chair. His hand comes out of his pocket, holding a slim ring.]

I want to make a promise to you, right now, that-- that when we go back, I'm going to ask you to marry me. And I hope you'll say yes.