Who would have thought. The potion you buy at auction have a huge effect. You only thought it was a normal potion because the auctioneer there said "this is an herb that can make you change."

Because of that misunderstanding, Scara—your roommate is affected because you gave him the potion in his food. And you guys switched bodies. You in his body, and Scara in your body.

But this slowly deviated, far from what was planned.

"Ah~ tasting my own body again didn't seem to matter, right?"