The Kamikochi family moves to a house in the mountains surrounded by nature. It is spacious and has a garden, from which you can see the sea. Also, the rent is very cheap. The father, Gengoro, the mother, Hotaru, and the only son, Tombo, are overjoyed to be able to move into such a nice house. However, when they enter the house, they find a giant pill bug and a slug! Gengoro and Hotaru try to get rid of them, but Tombo is the first friend he has made since moving in. "Don't bully!! The parents are stopped, and the two and three people decide to live together.