Touya, a boy whose face was too scary, was enthusiastic about Inami-san, the most popular girl in the school, But she had a dark side....!!

"You fought twice against my father, Rodias, and once with my brother, Shalk. You lost every battle, but you're still alive". Tina's voice was a bit ecstatic.
Tina, the daughter of the leader from the world's strongest cavalry corps, the Vassamund cavalry, got to meet Du Darkus, an unorthodox hero with the nickname "The Always losing General" in her first time going on the battlefield.
This is a fantasy war story following a hero named Du Darkas, his follower Tina, the princess general Sharna, and other attractive characters' way of life in a war torn world that's full of conspiracies.

As a six year old, Rintaro is diagnosed with Henisei Tashu Ijou Syndrome (also known as Hentai Syndrome), a disease that could kill him if he gets sexually aroused. To save him and provide a way for him to live as normal a life as possible, his father teaches him the ways to control his body and mind for ten years in the mountains, with the martial art of the Koei Sougetsu. When he's 16 he chooses to enroll Nangokuren High School, which he assumed to be the biggest all-boys school in the country but is actually the biggest all-girls school that has just gone coed.

On his first day he stumbles upon a large scale battle and learns that the first rule of the school is that it "Abides the Law of Nature" which has turned the campus into a war zone-like environment. Rintaro now sees transferring out as his mission, but will it be that easy now that he's caught the eye of the 3 "Dragons", the bodacious female leaders of the three biggest factions around?