Chi is a mischievous newborn kitten who, while on a leisurely stroll with her family, found herself lost. Rescued by a young boy named Yohei and his mother, Chi was quickly and quietly whisked away into the warm and inviting Yamada family apartment...where pets are strictly prohibited. While the family never intended to keep the kitten, Chi has slowly clawed her way in to the family, winning over everyone with her kitten idiocy and charm.