My father, who was assigned overseas with his son Ken left alone, was worried about working hard on muscle training without eating rice after Ken decided to appear on a program called Muscle Champ. - So he came to ask for a housekeeper. - Even if Kaede came, he was still absorbed in muscle training, but he was worried because he couldnt do only the abdominal muscles no matter how much training he had. - One day, Ken, who happened to witness the maple pants during housework, suddenly became able to develop his abdominal muscles with that momentum.