Youhei and his mother unexpectedly encounter a tiny kitten that they endearingly call Chi. Disregarding their apartment's pet prohibition, they choose to take Chi home and make her a part of their family. Chi, Youhei, and his parents share joyous experiences, forage new acquaintances, and savor delightful moments together. In their day-to-day routine, Chi and her loved ones embark on little escapades with their numerous newfound comrades. Despite Chi's occasional misadventures, she remains confident in her family's unwavering affection towards her.