[While he is comfortable, it does feel -- different, to say the least. He is used to sleeping alone. On the hard floor. On sofas or benches or other furniture. At the Shinsengumi Headquarters he had to spend most of his nights there and sleep in an environment that felt less than homely and comfortable, and be disturbed and rush out when there were emergencies.
This felt different enough that it eventually caused him to wake up in a bit of a panic, and he gently shakes her.]