Synopsis
Arisa, a sixteen-year-old high school student, winds up with an experimental combat suit invented by her brother forcibly implanted inside her body. The suit is rather embarrassing because it makes her let out an H voice whenever she transforms. On top of that, from that very day onward, Arisa is compelled against her will to battle a secret evil society. "Oh, I want to confess my feelings to Matsumoto-senpai, the guy I dream about—but whenever I try, I end up transforming into an H battle suit."