[RL - Touchy-Feely Virus]

Issei was not exactly at his most alert after waking up, and certainly not at his most alert after waking up after passing out from stress and exhaustion. (He really hadn't gotten enough sleep when he was at Shirou's house. That could have been a problem.)

Thus, when he noticed that he was curled up - snuggling, really - with someone who hadn't been there the night before, he wasn't nearly as startled as he should have been. Mostly, he was just confused. "...Is that you, Haruto?"