I can't imagine it'd be comfortable for her to sleep with her hair done up.
when you have longer hair, it tends to get into your mouth when you sleep, which becomes a choking hazard
Hah!?Aaaah♥Fufufu...
That was... an afterimage!A ninja!?!※ RyuujouHah!?
It... it was a dream...?But, she was thinking at that moment that she'd probably pull it off.That's Houshou-han for you, getting all that way...