Ryosuke Hinode moves in with relatives the Hinode family, located at Ishibashi Castle in Lake Biwa, as he enters high school. The Hinode family possesses a special power. Tanjuro s the heir of the Hinode family. He has eccentric tendencies and does odd things to Ryosuke like making him wear a red uniform to go to school. Tanjuro and Ryosuke attends the same high school. Due to an error, they both confront Hiromi Natsume, the first son in the Natsume family. The Hinode family and the Natsume family have been hostile with each other for 100 years.