Amawa Hibiki is a young man just out of college, with an education to be an athletics teacher. He's been having a hard time finding a job since he graduated, so all his money has gone towards living expenses. When his landlady demands his first payment to live in her living establishment upfront, he heads to the local middle school to get hired as a teacher. However, the principal refuses to hire him without hesitation. She will not hire men as teachers and makes it clear that she hates all men, saying they put no love into their passions and work. Amawa does not give up and with the help of his landlady, he crossdresses as a woman without a second thought, and gets hired, so he can earn money and also prove the principal wrong. Now, he has to keep his real gender a secret, and avoid strange situations, including the affections of his students (from both genders).

Manaka Junpei encounters a beautiful girl on the roof of his school. Pictured against the backdrop of the setting sun, with her wind blowing through her hair, Junpei manages to catch a glimpse of her strawberry panties. Embarassed, the girl runs away before he even gets the chance to talk to her. His only clue is the math notebook she dropped, with the name 'Toujou Aya' written on the cover. The next day, he finds that the 'Toujou Aya' who owns the notebook is the exact opposite of the girl he saw on the rooftop. There’s no way it can be her, can it?

Loosely based on the novel 'Romance of the three kingdoms', modern day Japan sees a similar struggle for power between different rival schools with the three strongest being; Kyosho Academy led by Sousou Moutoku, Nanyo Academy by Sonsaku Hakufu and Ryuubi Gentoku from Seito High School. Together these three tousei, each with their own mangatama, fight for the honour of becoming ikki tousen and fulfilling their fated destiny through battle and conquest.