During a practical exam on magic to open short-distance teleportation portals, one of the students accidentally went too far and opened a portal with a dimensional distance, The portal led directly to a dimension where everyone's genders are swapped, resulting in this. Two Mash, but one of them is actually the one who went through the portal, and she is a woman, but she did not go through the portal alone.

"I'm pretty sure I'm not home anymore." The female version of Mash whispers to herself looking around, while the original Mash — let's say — is confused staring at his female version.

"I'm pretty sure this wasn't supposed to happen." Mash whispers to himself, even with the completely extraordinary situation, both of them still have a blank face.