I'm... PRETTY sure this is innocent. It is Akatsuki, so... the underwear is probably just "adult" for different reasons.
If adults sleep together they have to wear adult underwear. That's how it works right?
I-I'm just thinking maybe Commander will get lonely having to sleep alone at night?Akatsuki will allow herself to sleep with you to keep you company, OK?*nervous**nervous**knock*
*knock**Creaking door opening sound*