The seven teenagers who committed crimes had their body parts related to the crime they committed taken away and was sent to a school with a locked room. To return to their normal lives, they have to continuously take the examination and graduate as the first in class within one week, or else...

Dolls Fall revolves around the lives of students at Jiaiin girls dormitory, an orphanage for middle school children without families. They are greeted with open arms by the matrons and other students, taught to accept their fellow orphans as sisters and the matrons as their mothers.
Jiaiin is a safe haven for students, provided that they follow two simple rules: at night, lock your door and don’t leave the room, and never enter a matron’s room.

The official manga anthology of the hit mobile game, Dolls Frontline (Girl's Frontline Japanese's title), by various manga artists.

From Friendship Scans:

Ke Lin received a doll with the same name as her as a present from her dad, who found it on a business trip in Germany. When she took her new doll to go play at the park, she met and became best friend with a boy at the park.

However, he had to move away soon and so, he made a promise with her that he will come back and find her. She gave him one of the glass shoes tied with a ribbon from her doll with her name on it as something to remember her by. Every day, she comes to the park waiting for him…believing that he would come see her again.

Fast forward to a few years later, Ke Lin is now a high-hchool student. QiangShu is a one of the students from the same high school. Ke Lin is attracted to QiangShu and reminded her so much of that boy from her childhood. However, there is a big problem – QiangShu is a GIRL!?

Second part of the Agreement of the Glass Shoe trilogy.

A sudden transmigration cycle occurred, breaking the norms of a normal high school student, from that day onward, he enjoy the company of otherworlders but how he adapts to the comedic and absurd lifestyle when the impending threat of the world looms near...

Humanity's peaceful days all at once transform into an unspeakably odious hell.
The sudden invasion of wasp-like insects, along with gargantuan "dolls" wielding their enormous alien weapons, annihilating everyone in their path.
In the middle of the chaos, high school first-year, Iruma Ikaruga, fights to save his best friend and his beloved senpai from the dolls' assault with an unyielding spirit.
However, all that awaits him is despair.
Just what are the enormous puppets known as "Dolly"after?
What fate awaits Iruma?
The curtain has risen on humanity's "puppet show" of unimaginable despair, and the battle for survival has begun.

She isn't beautiful and isn't smart, is this why she is at the bottom of society? If there was something that allowed you to reverse fate, are you willing to pay something so precious and valuable to change it?

As the Jessica Carba Empire was under attack of thousands of horned demons, the badass mercenary Marry Wood stood out and defeated them all with one man power. However, he wouldn't be able to protect the empire the next day as he claimed to have important business which turned out to be a performance of his favourite idol. Back in ordinary life, he is one of the mysterious 4 heavenly kings who just seem to be nerdy otakus.

From MangaHelpers:
Tonight, Natsuo loses his virginity. His partner? Her name is Rui and he just met her today after school. She's the one that brought up this whole situation, stating that she wanted to simply gain the knowledge about sex. She does not want to start a relationship, nor does she care about Natsuo.
Afterwards, Natsuo feels guilty for losing his virginity to a girl he doesn't even particularly like. Mostly, it makes him feel like he betrayed his crush to his high school teacher: Hina. A quirky love triangle story unfolds as Natsuo, Rui, and Hina all end up becoming part of the same family.

"Ajumma if you want to keep working, it will be in your best interest to listen to what I say." The surprise return of the parents along with a foreign housekeeper mother and daughter pair. The thrilling cohabitation with these ladies begins.

Tsuchie Takeshi has dreams of when he played with Hikari-chan as a child. He remembers her as a kind, sweet girl. However, one day on the way home from school, Takeshi is abducted and taken to a huge house, only to find out that she's become an arrogant, violent dominatrix (emphasis on violent). Furthermore, she says that he promised to marry her! How will he adjust to her new personality, and living with her as a new son of her prestigious family?

Welcome to the future of vast bio-constructed cities with crime so severe that the cops drive tanks! For top tank-cop Leona Ozaki (and her trusty tank, Bonaparte), the day-to-day is a tall order already, but when the villainous and sexy (and super-powered androids!) Puma sisters become duly deputized officers of the law and are assigned to "help" Leona catch Urushi-Maru, "The Skyscraper Pirate," things are bound to get out of hand, especially in the midst of a full-on, tank-on-tank streetfight between Leona and a corrupt arms manufacturer bent on getting the city's police tank contract!

From MangaHelpers: At the scene of a terrible murder, only Todo is able to find the surviving little girl in the closet--his niece Tsubasa. Four years later, Todo and his father are caring for Tsubasa, who no longer speaks, and Todo continues to work as a police detective. He's assigned to a new partner, a young woman with a promising future, Saeki. As Todo and Saeki team up to solve murder cases together, they will also both have to confront their own painful pasts. [tethysdust]

Sae, a young lady of a wealthy family, sometimes can't control herself and gets the urge to behave in a manner unbefitting of her upbringing. It's her butler's job to intervene.

This is the original Niconico Seiga version of "Domino Kick - Naraberareta Domino o Kick Shitara Dou Naru no Kashira?" (I wonder what would happen if I kicked a line of dominoes). As opposed to the Gangan Online version, it doesn't have the subtitle and has a partially different set of chapters.

A 21 year old guy named Hamadayama Kouzou struggles to live alone in Tokyo after running away from home, he meets a man named Domoto Kanji and his life changes drastically.

A twisted old man, gifted with extrasensory powers, silently holds sway over an entire block of apartments. The occupants are puppets for him to control. Life is his to give...and to take. But suddenly there is a new voice in his head, and before he knows it, a young girl with her own battery of psychic abilities has arrived to challenge him! Soon, the sprawling complex becomes a battleground between two minds possessing incredible, unimaginable power.
Note: Won the 15th Seiun Award for Best Comic (1984).

Josh is a 15 years old Bully who have been expelled from his highschool for hitting a student who threatened another student. Thereby he was thrown out of the house by his mom. Now he's trying to get into a federal agency named The SCB.

After living in Transylvania for several years, "Earl Dracula" (as Osamu Tezuka's official website calls him in English) has moved to Japan. In the Nerima Ward of Tokyo, he and his daughter, Chocola, and faithful servant Igor continue to live in the castle.

Polite and proper college student Akira Takanashi has a secret. Back in high school, he fell deeply in love with his teacher but was spurned. Now, whenever the pain of his heartbreak gets to be too much, he finds comfort in the arms of med student and notorious playboy Shimakawa—very adult comfort. Shimakawa would gladly go out with him, but Akira’s past heartbreak means he insists on keeping things strictly physical—well, until his obsessed younger brother Jutta arrives to disrupt this comfortable routine!

Lin Mubai life is the most fortunate and the most unfortunate thing: accidentally peeping Song Qingxiao, that he was most likely to see the secret light. Since then, he chased her, and she fled … … he suppressed, she resisted … … he fell, she began the road against the reverse, the ultimate back pressure success! Fame, Lin bai to give their love made a summary: the most blood of the encounter, the most twists and turns of the process, the most perfect ending!