Kanon spin-off OVA bundled with vol. 22 of the Kami nomi zo Shiru Sekai manga.

Ayumi Mamiya is a witch cursed to lose her powers but there is one boy who can break the spell and save her. Haruo Yoshikawa thinks he is a normal boy but unknown to him his three sisters are witches who use their magical powers to keep him protected and ignorant about the existence of magic. Now Ayumi must wake up Haruo’s latent powers to save herself but his sisters will have none of that.

Ayumi Mamiya is a witch cursed to lose her powers and only one boy can break the spell. Haruo Yoshikawa thinks he is a normal boy but unknown to him his three sisters have magical powers and keep him protected and ignorant about the exsistence of magic. Now Ayumi must wake up Haruo's latent powers to save herself but his sisters will have none of that. (Source: ANN)

Four Netherworld Princesses have come to the human world; witch Uma, vampiress Pachira, werewolf Liru, and android Aiko. But they know nothing about human life and their mistakes make up their daily adventures. Meanwhile, the evil Dr. K-ko wants proof of the supernatural to gain admittance into the scientific elite and what better than one, or all, of the princesses — if her plans didn’t have a tendency to go awry.

The alien invader Goa plots to conquer the Earth. He first warns the Murakami family (father Atsushi, mother Tomoko, and son Mamoru) of their invasion, and demonstrates his powers by transporting them to a prehistoric jungle and destroying a Giant Dinosaur before their very eyes. But they will not agree to surrender to Goa, so hope comes in the form of Magma, an armored, golden giant with long hair and antennae. He and his human-sized wife Mol, both created by the wizard Earth are sent to defend our world against Goa. They befriend Atsushi and Mamoru, the latter has Magma emotionally touched, as he wanted to have a child with his wife Mol, so Earth creates a duplicate of Mamoru, named Gam Earth gives Mamoru a whistle, with which he can call Gam Mol and Magma in times of crisis. So when Goa unleashes his various daikaiju, chances are, Magma, Mol, and Gam will fly to the rescue.

The alien invader Goa plots to conquer the Earth. He first warns the Murakami family (father Atsushi, mother Tomoko, and son Mamoru) of their invasion, and demonstrates his powers by transporting them to a prehistoric jungle and destroying a Giant Dinosaur before their very eyes. But they will not agree to surrender to Goa, so hope comes in the form of Magma, an armored, golden giant with long hair and antennae. He and his human-sized wife Mol, both created by the wizard Earth are sent to defend our world against Goa. They befriend Atsushi and Mamoru, the latter has Magma emotionally touched, as he wanted to have a child with his wife Mol, so Earth creates a duplicate of Mamoru, named Gam Earth gives Mamoru a whistle, with which he can call Gam Mol and Magma in times of crisis. So when Goa unleashes his various daikaiju, chances are, Magma, Mol, and Gam will fly to the rescue.

Dr. Kazuki, who perceived of an invasion of Earth by the Izaru people builds a robot based on the science of magnetism and sphere joint theory. Undergoing a dangerous augmentation process, Dr. Kazuki's daughter Mai becomes the pilot of "Mighty" or "Magnetman Minus". Takeshi Houjou becomes the pilot of "Puraiza" or "Magnetman Plus". The pilots would hold each other and then physically trasform their joint bodies in a metallic plate locking itself on the Gakeen (Short for "Gathering Keen") robot's frame thus enabling the super robot to move and fight. This sequence was notable, to an adult's eye, for its almost-sexual connotation.

Shiratori Ryuushi is a young artist-in-training, about to start studying at a vocational school. Arriving at his new lodgings, Narutakisou, he finds himself the focus of attention for the collection of weirdos that inhabit the place. He also meets and falls for the landlady, Aoba Kozue, who seems to be both lovely and charming. However, Kozue is not what she seems to be… in fact, she’s more.  

Plot Summary: Vesper is a secret agency fighting an army of alien invaders by using super-powerful battle androids. Mahoro is Vesper’s most powerful battle android and has won many battles, but she has little operating time left and soon will cease to function. However, if she lays down her arms and conserves her remaining power, the time she has left can be prolonged to just over a year. Mahoro is given an opportunity to live the remaining time she has as a normal human. She chooses to live as a maid for Suguru, a phenomenally messy high school student who lives by himself after his family passed away. Genres: action, comedy, romance, science fiction Themes: Alien, ecchi, Maids, Mecha, Military, Robot Girl

Vesper is a secret agency fighting an army of alien invaders by using super-powerful battle androids. Mahoro is Vesper's most powerful battle android and has won many battles, but she has little operating time left and soon will cease to function. However, if she lays down her arms and conserves her remaining power, the time she has left can be prolonged to just over a year. Mahoro is given an opportunity to live the remaining time she has as a normal human. She chooses to live as a maid for Suguru, a phenomenally messy middle school student who lives by himself after his family passed away. (Source: ANN)

Plot Summary: Vesper is a secret agency fighting an army of alien invaders by using super-powerful battle androids. Mahoro is Vesper’s most powerful battle android and has won many battles, but she has little operating time left and soon will cease to function. However, if she lays down her arms and conserves her remaining power, the time she has left can be prolonged to just over a year. Mahoro is given an opportunity to live the remaining time she has as a normal human. She chooses to live as a maid for Suguru, a phenomenally messy high school student who lives by himself after his family passed away. Genres: action, comedy, romance, science fiction Themes: Alien, ecchi, Maids, Mecha, Military, Robot Girl

As the relationship between Mahoro, Suguru and his classmates develops further, another android girl enters their lives and becomes attached to Mahoro. All the while, the number of days before Mahoro is to shut down decreases steadily. (Source: ANN)