Twelve-year-old Koushi Nagumo's life suddenly goes downhill when his father abandons him after their house burns down. Left to fend for himself, Koushi collapses on the street, but an eccentric woman named Mineru Wachi takes pity on him and brings him to the female dormitory Megami-ryou. After learning of Koushi's situation, Mineru, who happens to be the temporary manager, invites him to become Megami-ryou's official dormitory mother. However, what awaits him are the dorm's residents—each with their own wacky shenanigans—like the androphobic yet gentle Atena Saotome, the feminine tomboy Kiriya Senshou, and Mineru herself, whose recklessness knows no bounds when it comes to science. Despite this, Koushi does his best to fulfill the duties of this crazy new life!

It is thirty years after the failure of the Space Colonization Program. Humanity is nearly extinct. A perpetual and deadly Rain falls on the Earth. Men known as Junkers plunder goods and artifacts from the ruins of civilization. One such Junker sneaks alone into the most dangerous of all ruins—a Sarcophagus City. In the center of this dead city, he discovers a pre-War planetarium. And as he enters he is greeted by Hoshino Yumemi, a companion robot. Without a single shred of doubt, she assumes he is the first customer she's had in 30 years. She attempts to show him the stars at once, but the planetarium projector is broken. Unable to make heads or tails of her conversation, he ends up agreeing to try and repair the projector... (Source: Steam)

Lux, a former prince of an empire named Arcadia that was overthrown via a rebellion five years earlier, accidentally trespasses in a female dormitory's bathing area, sees the kingdom's new princess Lisesharte naked, incurring her wrath. Lisesharte then challenges Lux to a Drag-Ride duel. Drag-Rides are ancient armored mechanical weapons that have been excavated from ruins all around the world. Lux used to be called the strongest Drag-Knight, but now he's known as the undefeated weakest Drag-Knight because he will absolutely not attack in battle. After his duel with Lisesharte, Lux ends up attending the female-only academy that trains royals to be Drag-Knights. (Source: ANN)

Under Nariyuki Yuiga's devoted tutelage, his classmates Rizu Ogata, Fumino Furuhashi, and Uruka Takemoto are finally pulling average test scores on their worst subjects. But time is ticking, and there is still a long way to go before the three geniuses of Ichinose Academy are ready for their upcoming university exams. Meanwhile, the girls still struggle to balance the pursuit of their dreams with their growing affections for their unsuspecting tutor. Joining them are Mafuyu Kirisu, a teacher with strong views about education and talent because of her past as a rising figure skater, and Asumi Kominami, a graduate from their school aiming to attend a national medical university. With these two additions, the group of six is livelier than ever before. Completely caught up in hilarious antics with his new friends, Yuiga finds that his last year of high school now includes a lot more than just going to class and studying.