[Natsume does tend to be unashamed to say things out loud that others would find too embarrassing to give voice to. Just like how he's not bothering to hide how relieved he is.]

Got it. Though I have to let you know, I'm not very good at flirting.

[It's his attempt at a goofy comment, okay. Kazuya will feel a little tug on his robe.]

I really did enjoy waking up with you. Not just because you were warm.