Two boys, not even twenty yet, hardly a kiss's experience between them...

Not to mention Kazuki was kind of sensitive to this sort of thing, and admittedly easily excitable.

It was bound to happen eventually.

His kiss slowed down rather abruptly, and his eyes went wide with mortification. He had to pull away. "I, um," he stammered, his attention starting to flit in random directions, anywhere but down, "I uh, I think..."

Oh sweet Lord, have mercy, don't make him say it.