Mahou Shoujo Ai

Japanese Title: 魔法少女アイ

English Title: Sexy Magical Girl Ai

Plot
Something is running rampant in the streets of Tokyo. Every day reports of brutal rapes and murders increase. The victims are both male and female, and each one has been killed more brutally than the last.

After high school student Akitoshi has a terrible nightmare in which an inhuman monstrosity is assaulting his friends Yua and Mikage, only to be interrupted by a mysterious spear-wielding woman, the young man is shocked to realize that a new girl in his class strongly resembles the warrior he dreamt about. Ignoring the warnings from his teacher that all students should be home before dark, Akitoshi attempts to follow the girl after school to find out more about her... at which he fails miserably, making himself significantly late in the process.

Cutting through a building construction site, the young man is drawn by the sound of people on the second floor. When he investigates he finds his classmate at the mercy of three men and a hideous tentacled horror. When the creature notices him, Akitoshi quickly learns that the only person who can save Mikage's life -- and his own -- is the magical warrior he saw in his dream.

1- "Magical Girl Cometh"
(魔法少女ハ独リ)

Airdate: August 25, 2003

2- "Fall of Magical Girl"
(魔法少女散ル・・・)

Airdate: January 25, 2004

3- "Awakening of Magical Girl"
(魔法少女覚醒)

Airdate: August 25, 2004

4- "Magical Girl, Berserk"
(魔法少女狂乱)

Airdate: February 25, 2005

5- "Magical Girl -Love-"
(魔法少女-愛-)

Airdate: August 25, 2005

Second Season: Mahou Shoujo Ai San: The Anime
Ai, Rin, and Meg are magical soldiers who battle the evil Yuragi infesting the streets at night. The usually solitary Yuragi, attacking girls at random, have been collaborating towards an unknown goal. In the center of it all is Shin and his daughter Mayu, who Rin gave birth to after he raped her.

1 (6)- "The Magical Girl's Second Coming"
(魔法少女再臨)

Airdate: January 25, 2009

2 (7)- "Meg Encounter"
(メグ見参)

Airdate: March 25, 2009

3 (8)- "The Magical Girl's Calling"
(魔法少女光臨)

Airdate: May 25, 2009