The story revolves around a new team of Toei robot girls named Team Z that is made up of three girls based on Toei's Mazinger Z franchise: Mazinger Z, Great Mazinger, and UFO Robot Grendizer. Usually they perform in activities around Nerima ward in Tokyo to raise the awareness of the promising future energy source Photon Power (koushiryoku). However, there are times when Mechanical Beast team of girls emerge from the Subterranean Empire and attempt to steal the energy. Thus Team Z has to battle them to prevent this, though sometimes they just go and beat up the bad girls to relieve stress. Please note that because in this particular case MAL lists airings, not episodes/chapters/parts, this show is considered to be 3 episodes and not 9. Each of the three airings consisted of three episodes for a total runtime of 27 minutes per airing. The duration on MAL reflects this.

Bonus episodes 3.5, 6.5, and 9.5 included with the Blu-ray/DVD releases.

After Koutarou Satomi's father is suddenly relocated for his job, the first-year high school student is faced with finding a cheap place to live by himself. Naturally, he jumps at the chance to move into Corona House's Room 106 for a mere five thousand yen a month. But while everything goes well at first, Koutarou soon gets a lot more than he bargained for after stumbling upon a mysterious cave while working his part-time job. The following night, Koutarou is visited by various seemingly mythical figures, all of whom claim ownership of the poor student's apartment. Among the invaders are Sanae Higashihongan, a ghost supposedly haunting the room, magical girl Yurika, alien princess Theiamillis Gre Fortorthe, and Kiriha Kurano, a direct descendant of the Earth People. But more importantly, each of these four girls needs Koutarou's apartment for her own reasons and won’t back down without a fight! Rokujouma no Shinryakusha!? is a comedic battle royale over a six-tatami mat apartment involving supernatural beings, romantic high school hijinks, and a deceptively cordial landlady.

Three episodes aired on TV as part of the Ribon x Oha Suta specials. Akane: She's beautiful and popular, lively and full of vitality; Aoi: Looks like a small animal but is actually very clever. Who knew that these two very different people were actually... twin siblings?! (Source: MU) Note: Episodes were made available on the official stream few days before the official broadcast.