Kemeko Deluxe!
Remembering the girl from 10 years ago, Sanpeita at first doesn't believe that Kemeko is his first love, seeing as they look nothing alike (plus she also being a robot).However, when it is revealed that Kemeko is in fact a suit of robotic armor, piloted by a pink-haired girl named M.M., who greatly resembles his first love.M.M., in the guise of Kemeko, instills herself into Sanpeita's life, moving in with him, becoming a teacher at his school, and likewise following him everywhere, presumably to protect him from the robots Mishima Electronics who are constantly targeting him for a mysterious power that he supposedly holds...Mai then appeared, revealing that she had known about this and her father's projects, one of which included the "Nano Ball", a seed that when given time to germinate inside a host, was a source of limitless power.When their father arrives and warns them of the danger, Mai tells him that she has no intentions of stopping what he started, and that she plans to use the power of the Nano Ball to create a perfect world for her and her sister.Mei escapes, and their father, who has been mortally wounded by the Nano Ball, gives her Kemeko, and sends her off into space, telling her to forgive Mai.Her plans are put to end when Mei destroys Mai's Himiko, an advanced version of the Kemeko, and kisses Sanpeita to seal the power of the Nano Ball.His life was turned upside down when he was approached by Kemeko's pilot, who claimed to be his fiancé and moved into his house.Whenever he's in life-threatening danger, the Nano-Ball, that was planted inside of him, activates its self-defense mechanism, unleashing power that always defeats any threat posed to him and propelling him to safety.His personality is kind, but because of a number of misunderstandings that are out of his control, he is constantly physically assaulted by both family, friends, and enemies alike.Her default paint scheme is a reference to the plugsuit used by Asuka Langley Soryu in Neon Genesis Evangelion.Ten years ago she escaped from the spaceship (her home at the time) that she came to Earth in, so she could go sightseeing, and met Sanpeita and Izumi.Her inability to recall the memories in her journal is a source of great pain for her, and living with Sanpeita is a constant reminder of what she has lost.Whenever something perverted happens to her, she yells out "Unhealthy", then decks whoever caused the action, which Sanpeita is almost always on the receiving end of her rage.She is revolted at first after finding that her brother got himself a "girlfriend", but later she befriends Kemeko and welcomes her into the house, even calling her "sister".Misaki's older sister, who has a fetish of wearing a maid outfit and acting like one, to the extent of making Sanpeita be her master.