Shomin Sample by Takafumi Nanatsuki (Seven Seas)
Ordinary high schooler Kimito Kagurazaka is kidnapped and taken to an elite, isolated girls' academy to serve as a "commoner sample" so the sheltered students can learn about regular people. Pretending to be the perfect commoner is a lot harder than it sounds.
Every volume we have, in stock and sold out, is below. Add sold-out volumes to your wishlist to hear when they're back.
