Daisuke attends Touka Gakuen in Miou-jima, a small town which is an 1-hour ferry ride from Tokyo. He is great at housework and studying, but because of his scary looks, people mistakingly think he is the worst deliquent. He works as the caretaker of the Yashima-sou school dorms where his two older sisters Otome and Megumi live. They know he is an earnest and kind person. One day, he receives notice from the school that Yashima-sou will be torn down.