In order to take over her grandmother's Dagashi store, art student Kumi Honamanuma moved to Kyoto. She met Harami Mino, K Kusanagi, Mai Haisaka, and a dog who lives in the store, which supposed to be empty. Kumi ended up living with these girls, who claim that they are heroes reincarnated to contemporary period to chase after the demon king. Harami and others seem to live in a peaceful life with no missions to to do anymore, Ran, who was demon king in the past and appears to be an elementary school girl from failing to reincarnate, one day. The story begins with Ran requesting to collect demon king's fragments.

Recap of leading up to the seventh season.

After a crushing rejection, the heartbroken Youta Moteuchi trudges home. On his way, a dimly lit video store catches his eye, and he ends up purchasing a "video girl" tape meant to ease the hearts of lonely men. However, when he tries to play it in his broken VCR, a beautiful girl leaps out of his TV and lands on his bed. Calling herself Ai Amano, she looks like a golden opportunity for Youta to finally experience true love—that is, until her personality, now troubling thanks to the broken VCR, shows through. Despite her flaws, however, Ai wholeheartedly promises she will ensure Youta finds happiness and true love in his life. Video Girl Ai follows the daily life of a teenage boy and his pursuit of a fulfilling romance. With the help of his virtual guardian angel, Youta sets forth to find the girl of his dreams.