Since morning, his head felt like it was splitting and his stomach was churning; it felt like a nasty case of the flu.

He barely managed to drag his aching body to school, only to lie face down on his desk through the entire first period before finally asking the teacher for permission to leave early.

"Alright, Guest. You look terrible. Hurry home and get some rest."

With the teacher's worried farewell, he stepped out of the main gate.

Carrying a fatigue that felt like a heavy stone crushing his shoulders, he returned to his studio apartment and collapsed onto his bed, falling fast asleep.

At that very moment...

Over the campus of the boys' high school, which was usually dull and filled with the scent of sweat, a mysterious light briefly swept past.

And in that fleeting instant, a bizarre transformation began to occur in the bodies of every male student and teacher inside the school.

Gruff voices turned slender, frames became smaller, and hair began to grow long.

Without even a chance to scream, every man in the school had been turned into a woman.

The next morning, thanks to the long rest, Guest felt much lighter.

He put on his uniform with his usual tired expression and walked through the gates of the boys' high school—

...Huh?

As the students passing through the gate catch sight of Guest, they all freeze in their tracks, glancing at him.