One fateful day, a young boy named Youhei and his mother discover a tiny kitten named Chi and decide to defy their apartment's no-pet policy by welcoming her into their home. Together, Chi, Youhei, and his parents embark on a heartwarming journey filled with friendship, cherished moments, and delightful escapades. Their everyday lives become intertwined with new acquaintances and joyous experiences, creating a tapestry of love and companionship. Through ups and downs, Chi finds solace in the unwavering affection of her devoted family.