On the first day her family moves into their new house, five‑year‑old Ami‑chan discovers a door in the floor of her bedroom that leads to a hidden world called Animal Yokocho. There she befriends three talking animals: Issa, an overly innocent and soft‑spoken panda; Kenta, a highly strung bear who always wears a red scarf and maintains a tough‑guy façade; and Iyo, a rabbit who tends to prioritise her own well‑being and enjoyment over the happiness and safety of her friends. Even at only five, Ami‑chan proves to be the most rational of the group and is initially wary of her new companions. Over time she becomes more comfortable and begins spending her free time with them. A typical day involves Ami‑chan and the three embarking on various adventures together.