From Panda Scans:

Sanjou Arashi is a serious and reliable second-year high-school student working part-time at a detective agency. Her boss is a gambling, irresponsible, tobacco smelling oji-san. The pair are complete opposites, but this is the story of a scruffy oji-san X high-school girl romantic comedy!

Tenma Gabriel White graduates Angel College as top of the class and is sent down to earth, along with her classmate Angels to study Humans as a High School student to learn how to better lead them down a righteous path.
At least that is how it should have gone down. Instead Gabriel got addicted to video games and junk food. She even tries to skip school. A failure of an Angel.
Luckliy her Angel-like Demon friend Vignette April Tsukinose helps keeping her on track. Especially by remarking that No-Good Angels get deported back to Heaven. A fate Gabriel wants to avoid because she thinks that her lazy self is her true self, and because Heaven is now too boring for her.
At school Vignette's Demon buddy Satanichia McDowell Kurumizawa causes mischief from time to time. She is egged on by an Angel named Raphiel Ainsworth Shiraha (2nd-best in class after Gabriel) who has slight Sadistic tendencies towards Satanichia.
From time to time Gabriel's shy Angel-underclassmen Tapris Sugarbell Chisaki pays her school a visit.

A lazy Angel, an Angel-like Demon and her pompous Demon-buddy Satanichia and Satanichia sadistic Angel "follower" in one High school.

Hijinks ensue.

Alexander, whose hometown was destroyed by the demon race, fought with the Demon King and was killed. But instead of the afterlife welcoming him, when he opened his eyes, he was reborn as the Demon King's son, Jilbagias!? While hiding his true identity, he stains his hands with atrocities as he conducts himself as the ideal demon prince, increasing his power to ultimately overthrow the Demon Kingdom...

Fushimi Hina is the most universally recognized S-class beauty in the school. She is a childhood friend of Ryo, but they hardly spoke to each other from junior high school, but one thing leads them to talk to each other again.

Saku Kanakura was a boy born into a poor household. He studied hard and managed to pass the exam to an excellent high school but, it soon turned out that his parents were in debt! When it was time to pay the debt off, a mysterious gal appeared and offered to pay off their debt. A big burden was almost off Kanakura's head, but the gal made a condition in return which stated that—

Among the various realms, is the manliest and most handsome evil god in history! The peerless and handsome Xie Yan crosses over and falls into the vixen's lair. In order not to be drained of his entire life-force, he travels between various realms, cuts down a son of god, and repels an invading union hailing from across the ocean… This is the story of how he eventually becomes an evil god.

It portrays the famous naturalist Plinius. From volcanic explosions and tidal waves to the ecology of plants and animals, the work reproduces the world of Natural History, the Plinius encyclopedia describing the universe. This is a definitive historical Roman romance depicting the world 2,000 years ago through astounding composition and realistic draftsmanship.

Ahyoung is the director of a down-on-its-luck animal hospital. Pragmatic, blunt, and single, this 30-year-old veterinarian is determined to succeed! But she is barely able to make ends meet... that is until a mythical creature makes its way to her hospital. With the help of her talking cat, her softie werewolf assistant, and her chipper dragon friend, she is committed to treating all fantastical beasts that make their way to her door. It can’t be that hard… right?

Kamihate Uryuu, orphaned since childhood, receives an invitation to stay at the local Shinto shrine. All he wanted was a quiet place to study so that he can fulfill his dream of making it into a top medical school, but after arriving there, he comes across three beautiful shrine maiden sisters... and the head priest requests that he marry one of them and take over the shrine. A tale of love and miracles is about to unfold!

Written by the assistant of Negi Haruba, the author of 5Toubun no Hanayome, who recommends this work.
(Full serialization confirmed on author's twitter).

28 years ago, Tamura's parent was responsible for a mass indescriminate poisoning case while he was in elementary school, and he grew up branded the son of a criminal. After his wife dies in childbirth, Tamura heads back to Hokaido to confront his past. The mysteries surrounding his father, a police officer, goes back to the year of 1989...

An otaku’s idol moves right next to him. And it’s a dream come true! But as it turns out, she’s a bit more sadistic than expected. Are you seeing a trend here? There's no mercy. Submit to the bully girl of your dreams now.

This is a love story of a man and a woman who doesn’t believe in anyone . The popular psychological betrayal web novel finally gets a manga adaptation!

A collection of four bizarre and awkward short stories highlighting what happens when weird guys meet even weirder girls.

Story 1, The Lunar Surface & Eye Sockets: Gotou Kosuda takes a job he doesn't want because of the girl who works there, but then finds out she's leaving. Can he make an impression on her before time's up?

Story 2, Flooded City & The Chuo Railway Line: Natsuno Fuda works at a karaoke joint, and every night this girl comes in with a different guy and uses a different name. The thing is, the names she uses are actually the stops on the Chuo Line, and Fuda is a giant train geek.

Story 3, The Cactus-tamer's Apprentice: A high school boy named Susumu Natori discovers a wacky relative who he winds up turning to for advice about a problem at school.

Story 4, The Wasteland of Sugar Fanatics: A man who can mentally fast-forward time is challenged to rewind it.

Shizuma Suzumori had a normal high school life until one day, a serial killer attacks the classroom.

The average Korean citizen who has been desperately trying to be a hero for 11 years has realized that this is not his craft or his dream. After giving up everything, Lee Kun Woo decided to become a farmer and live his quiet life. But is it that simple?

Airi Hirakawa, a model in a popular woman magazine, is suddenly hit by someone in front of her house and wakes up in a room full of garbage. Airi is confused when she is suddenly proposed by Hirokazu Imai, the man who is her kidnapper and stalker.

And this is how her life of confinement begins, where suffers sexual violence and where even toilet breaks and meals are managed.

*WARNING*
Contains abuse, kidnapping, rape, moral degradation, sadism etc.

Another short twitter manga… Featuring another "boy meets girl" at school setting…
**BUT WHAT COULD BE THE TWIST IN HERE?**

From Viz:
Her mother was a wrestling champion, her father a lightweight world boxing champion, her grandfather the first Japanese to become the world champion of Muay Thai kick boxing--but high school girl Elle doesn't want to fight! She just wants a normal life, but is it possible with such a violent family history?

*Also contains two other oneshots in volume 3:
• Nandemo Ari sa (Anything Goes)
• Hibari Telepathy: Hibari Kataoka is a tomboyish girl in love with the hottest MVP basketball player Sora Migumo but they don't seems to get along well.

The tower. An unknown place with many rapid changes.

Ten years later, I reincarnated into the body of a boy who lives on Earth in South Korea.

“The guy who backstabbed me and the one above him… I’m going to rip into them.

” The person who reached the top as a necromancer and achieved the class above that, Spirit Master Cha Jinhyuk. As the “All-Master,” he will take his revenge by climbing the tower as a necromancer.

Set in a part of Tokyo that has descended into a quagmire, the story follows Unit 8 of the 5th Special Public Security Section's 3rd Mobile Assault Division, popularly called "The Eighth," who don powered armor "Willwear" exoskeletons to counter the rise in crime.

Assistant inspector Asami Kazari is assigned to The Eighth with the task of assessing the unit's status and reporting it to her superiors. But her true goal is to rehabilitate this sloppy, haphazard, justice-less group.