[It wasn't so much that he worried about bothering Diluc about this (he stopped that after the second or third time this happened) but more so that he wasn't tired. And a little restless.

He carefully turned around and sat down on the railing, his knees were on either side of Diluc's waist and he squeezed them playfully.]

I just didn't want to keep you up. I'm not sleepy tonight. But if you're going to wait up anyway, then I can always figure something else out here. Or maybe you can come with me.

[He swung his legs playfully.]

A little midnight stroll.