Just a hunch, but I think Hama-kouhai wears bikini bottom underneath her panties because even she herself is aware of how careless she can be.
Must I tell her?Why, the face that my kouhai would make, writhing around from the shame...No, that's simply insensitive, right? And the Admiral's here too!What should I be doing here?
Do I have to tell her?
"Kouhai. Your panties are away from home"... or something?Oh man... I kinda want to see that...