Kazuya, who lost his mother and has been living with his father in a three-legged race. One day, when Kazuya comes home, he sees a gorgeous home-cooked meal and a young woman. She had heard that it was Miki, her father's dating partner. "Dad, I decided to remarry Miki-san." She suddenly became her mother-in-law, a young beauty. …It was inevitable that Kazuya would be conscious of Miki as a woman.