Six months have passed since the victorious Battle of Britannia and the reclamation of Gallia from Neuroi invaders. Yoshika Miyafuji, member of the famed 501st Joint Fighter Wing, has come back home to Fuso and graduated from middle school. However, her fight is far from over. She receives a letter supposedly sent by her long-deceased father, containing blueprints of a state-of-the-art Striker Unit he had been working on before his death. The Unit, designed specifically for Yoshika, might be capable of harnessing her extraordinary magical powers. Meanwhile, a new threat in Europe is rising. A Neuroi nest of an unprecedented size and might has appeared over Venezia, wiping out local Witch forces and instantly swallowing the northern part of the country. To make matters worse, a newly spotted humanoid type of Neuroi is attempting to come into contact with humans. Yoshika, incapable of abandoning her friends on the front lines, must once again venture to the war-torn continent. [Written by MAL Rewrite]

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.