In Iraq, a group of archaeologists discover ancient relics that prophecize the coming of a superior race and the end of all civilization. Meanwhile, back in Graviton City, as A-Ko and B-Ko's rivalry over Kei intensifies, Mr. Daitokuji sets up an arranged marriage between Miss Ayumi and Kei. Furious over the engagement, both A-Ko and B-Ko do whatever it takes to prevent the wedding from going through. Little do they know that another alien fleet is on its way towards Earth. (Source: ANN)

An ancient legend tells of a magical Powerstone that granted its owner any wish desired. Adventurers from all over the globe clash as they seek this mystical gem. Based upon the Dreamcast game, POWERSTONE tries to entertain us with the story behind the game's premise. The plot begins with our hero, Fokker, training to be a fighter like his idol, Vargas. (Source: AniDB)

Hatanaka Kosaku, a hopeful boxer, has a mean KO punch. Unfortunately, his dietary willpower is weak, and he eats even greasy hamburgers right before a bout. As a result, he has to compete in higher weight classes, and as soon as he takes an abdominal punch, he vomits, which causes him to lose the match in shame. As he tries to grapple with his weak will, he meets Sister Angela, a novitiate at a local convent. While Sister Angela strives to help Hatanaka in his endeavor, he seems to make her training to be a nun more difficult.

Second year high school student Ichirou Satou has always been an average person—that is, until he runs into some not-so-average situations with his teacher, Kana "The Demon" Kojima. Kojima is Satou's Japanese language teacher with a reputation for being so ruthless that even school delinquents bow down to her. One fateful day, things escalate when Satou runs into Kojima in the restroom, leading them to share an intimate encounter that makes his imagination run wild for days after. Nande Koko ni Sensei ga? follows the daily life of Satou and his teacher as they continue to meet under similar conditions, growing ever closer with each encounter.