Harumigawa Ransuke was a clean-freak and very serious high school boy. After being reincarnated in another world, he spent his second life as a girl named Cattleya who dreams of becoming a wizard. In order to become a respectable adult, Ransuke has never been interested in anything shady, but he is told that in order to use magic, he needs to be "horny" and excited. Then he meets someone who looks just like Akafuji Taiga, a classmate from his time as Ransuke, and while talking to him, he feels as if he has returned to his high school boy's body. He feels like he is cross-dressing without being noticed, and his body starts to heat up from a sense of guilt...!?
潔癖でド真面目な男子高校生だった春見川蘭介。異世界転生後は、魔法使いに憧れる少女・カトレアとして第二の人生を過ごしていた。立派な大人になるべく、一度もいかがわしいことに興味を持たずに生きてきた蘭介だが、魔法を使うためには「ムラムラ」して興奮することが必要だと告げられる。そんな中、蘭介だったころの同級生・赤藤大雅にそっくりな人と出会い、話しているうちに男子高校生の体に戻ったような感覚になる。バレずに女装しているような気持ちになり、背徳感から身体が火照りだして…!?