The Anime Lad
A high school outcast who has endured bullying begins living between two bodies that are opposites in appearance. He remains one person while society responds as though each body carries a different value. Daily life becomes an unusually direct comparison of how quickly people assign status. The experiment reflects poorly on nearly everyone.
Super Eyepatch Fox
One student switches between two bodies with radically different appearances. The world treats each version differently before learning who he is. School becomes the main stage for that contrast, placing bullying beside the advantages attached to conventional beauty. The supernatural mechanism stays simple. The social response supplies the pressure.
Gigguku
This premise makes beauty bias impossible to keep abstract! One bullied teenager lives through two bodies that look like social opposites, while his identity remains continuous. Every changed reaction becomes evidence of what people decided before he spoke. Action and comedy can move around that idea, but the core contrast is already painfully clear.
Father's Basement
Using two opposite bodies to demonstrate appearance-based prejudice is hardly subtle. Subtlety may not help this premise. The same outcast experiences sharply different treatment while remaining the same person, turning school life into a direct comparison. The supernatural device works because the bias it exposes requires no supernatural explanation.