[ The touch of Kaeya's tongue arrests Albedo's heart in his chest, his stomach tightening pleasantly. Is that all it takes, now? The soft touch of a warm tongue to make him warm, to make him want? This is a slippery slope, and may prove troublesome.

His exhale is soft against Kaeya's cheek as his now-slick thumb pads over Kaeya's upper lip. ]

...The results are encouraging, though I believe I need further data to form a concrete hypothesis.

[ Yes, he is flirting. Yes, it's terribly nerdy. ]

You are an exceptional teacher. [ A beat. ] I like this.

[ Why is it so unnerving to admit that? ]