The Nanatsuko Nezumi Series follows the everyday adventures of a family of mice. In Episode 1, the mother mouse strives to keep her seven children entertained by playing “Ressa Gokko,” but a snake threatens their game. Episode 2 centers on the father, who receives a letter from a friend requesting help in the forest; the family decides to venture out, though the children tire quickly from the activities. Episode 3 takes place in winter, with the children assisting their mother in completing her errands.