One year before the beginning of the story. Kaguyama feels intimidated by Haruna’s presence on the baseball team since he feels that his position as the ace pitcher is threatened. Kaguyama wants to quit, but Haruna talks him out of it after telling Kaguyama about his own past. (Source: Wikipedia)

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.

The moon and the earth are linked by a single contact point, "Mitsuru ga Sakichau Ouren Rakuniushi" where Tatsuya lives under the supervision of the Sphere Kingdom (Moon Kingdom)'s Princess Feena Fam Earthlight who is coming to stay at his home.

In the past, humanoid bears coexisted with humans. However, a meteor shower that fell onto Earth had a strange effect on bears throughout the world: they suddenly became violent and hungry for human flesh, spurring an endless cycle of bloodshed in which bear ate man and man shot bear, forgetting the lively relationship they once had. The "Wall of Severance" was thus built, separating the two civilizations and keeping peace. Kureha Tsubaki and Sumika Izumino are two lovers attending Arashigaoka Academy, who, upon the arrival of two bears that have sneaked through the Wall of Severance and infiltrated the academy, find their relationship under a grave threat. The hungering yet affectionate bears, Ginko Yurishiro and Lulu Yurigasaki, seem to see the bear-hating Kureha as more than just another meal, and in getting closer to her, trigger an unraveling of secrets that Kureha may not be able to bear. When their relationships provoke the Invisible Storm, a group that keeps order within the ideological school, the girls must stand on trial with their love, embarking on a journey of self-discovery en route to attaining true love's "promised kiss."