Shirogane Spirits!

Shirogane Spirits! is an adult visual novel featuring Touji Mamiya (真宮 刀士), a sophomore student, as the story protagonist. Touji moved to Kamishiro and to a new school following his grandfather's will. His grandfather was the master of Iaidou, and he wanted Touji to protect Kamishiro. The moment Touji stepped exited the station, he saw a girl wielding a sword and taking out multiple opponents which was part of "Kamishiro Battle Live" annual event where eight high-schools participate, granting the victor the control over city. Touji isn't really interested in fighting, but his Iaidou technique made an impression and he got recommended to the student council. Reluctant at first, he ended up accepting the offer to join. This pitted him against various opponents, but also introduced him to some allies.