Cool Kaichou Rin no Iinari Isshuukan ~Harenchi Meirei de Koibito Kozukurizuki no Sukebe Shikyuu ni Natte Shimau!~

The main character, Harada Kyouichi is excellent at but not interested in fencing. His childhood friend Rin is angered by this and challenges him to a duel. He accepts on the condition that if she loses, she has to follow a weekly order from him. He defeated Rin who surrendered. Unexpectedly she accepts the conditions and immediately recognizes she loves him. They become lovers and begin a romantic school life.