"Taniichiro", who was chased for embezzlement, arrives at the so-called Western-style building "Munakata Residence" in a remote snowy mountain. He was welcomed by her widow, "Munakata Rurie", as the head of the house, but as a condition of exchange, she will live in and become a tutor of "Munakata Nakoto", the daughter of Rurie. was. However, Rurie's request was not the only one ... "I want Mr. Tani to be her daughter Nakoto's first partner."