The mistery is... why is she wearing panties in the mirror?
suicidepacmen said:
it looks like they're just above her dropped pants in the foreground too, but that still doesn't explain why her hair isn't visible between her legs.
The answer is very simple - Sagiri is an artist, so she probably photoshopped her panties being down. She is also a little baka, so she probably forgot to photoshop her reflection too.