21st Century Girl is an omnibus feature that is of the girls, by the girls and for the girls. The work of 15 women directors under the age of 30, each of whom contributed an 8-minute film, the package highlights a range of genres, visions and thematic concerns.
Toko grew up unloved by her mother Mizuho who continues to adore her deceased son. She lives alone in an apartment the electricity has been cut off and the trash is piling up. One late night, Toko enters a gloomy building in order to escape from a threatening stalker, Tomita. There she finds a handgun. She brings it back home and confirms it is loaded with four bullets. One day, the family living next door who have already been enduring poverty and violence end up murdering a man. Toko helps them bury the man's body, shooting it with the handgun. Toko becomes captivated by the gun itself. She is further entangled in the true circumstances of the incident due to the detective searching for the handgun and a suspicious man Kazunari who knows a secret about the handgun. Toko tries to throw herself into the whirlpool but then the lid is blown off her "past."
Shibuya in Tokyo, a city that continues to change due to redevelopment. At a house in the corner of Shibuya, Ai dreaming of a model, Mizuho working for the editorial department of a magazine, and musician Erika live together. This story is about the modest cohabitation of the three.
Kyoko Hinami is a Japanese gravure idol and actress known for her role as Mitsuki Aoyagi/Akiba Blue in the 2012 Super Sentai parody series Unofficial Sentai Akibaranger. She was affiliated with Stardust Promotion.