"Little Miss Period" is a Japanese comedy film that follows the story of a young girl named Hinata, who is visited by her menstrual cycle personified as a cute girl named Miss Period. Miss Period comes to Hinata every month to bring her period, causing chaos and embarrassment in her life. Hinata struggles to deal with the challenges of puberty and growing up, while also navigating her relationships with her friends and family. Through humor and heartwarming moments, the film explores the taboo subject of menstruation in a lighthearted and relatable way.