Hitoshi Kobe is a terrible student and an even worse athlete ... though he does have an incredible talent for creating Artificial Intelligence programs. Thirty is his best artificial intelligence program yet -- and, more important, the only girl who will talk to him. Hitoshi's life is forever changed when a freak accident brings Thirty to life ...

From Tokyopop:
Hitoshi Kobe is a terrible student and an even worse athlete ... though he does have an incredible talent for creating Artificial Intelligence programs. Thirty is his best artificial intelligence program yet -- and, more important, the only girl who will talk to him. Hitoshi's life is forever changed when a freak accident brings Thirty to life ...

Features the same characters and locations as Mahou Sensei Negima!, however, this series has a different story than the original. The new storyline explains the addition of punctuation to the title.

In the decade since the world became aware of the existence of magic, the world has undergone massive upheaval. However, a boy named Touta lives in seclusion in a rural town far removed from these changes. His ordinary life is highlighted by his magic-using female teacher and his supportive friends. When his tranquil daily life is disrupted, he embarks on a unique adventure.
(Source: ANN)

Keitaro has had great difficulty getting into the university of his choice and no luck in meeting women. In a desperate effort to go into seclusion and study for his entrance exams, he decides to ask to stay in his grandmother's hotel. His plans are ruined when he discovers that the "hotel" is actually an all-girls dormitory ... and some serious distractions ensue.

The story revolves around a high school student named Shinya Matsumoto and his love story, which takes place in the summer vacation. Shinya unexpectedly encounters a car accident, which results in a mother and son being taken to a hospital. The son, Daisuke Kirishima, is completely fine while his mother, Reiko Kirishima must stay in the hospital for three weeks and is unable to look after her son thereafter.

In the story, a girl called Mai appears before a boy who happens to hate Christmas. As it turns out he was born on December 24 and thus was named Santa, causing him to hate the holiday. Moreover, as a child, he never had any festive occasions, such as birthday parties. With the power of Christmas, Mai is given the mission to improve his luck and change his views for the better.