The girl I fell in love with is… an alien!? I, the class president, happened to fall in love with my classmate, the eccentric Haru. I confessed my feelings, but her true identity was an extraterrestrial who came to Earth to survey it. “I still like you!” I started going out with Haru, but I have a further “secret” to keep…

From MangaHelpers:
This manga is related to the "Date A Live" novel and anime. It features members of the AST (AntiSpirit Team), a special squad devoted to fighting spirits. Okamine Mikie idolizes her superior AST member, Tobiichi Origami, and may be in love with her as well. Unfortunately, Origami seems to want nothing to do with her. One day, they end up heading toward an explosion that wasn't caused by a spirit. Instead, it was caused by a girl named Ashley Sinclair, who transfers to their school shortly after the incident!

The story is set in a world where supernatural powers exist through science, and magic exists through religion.

In the story, Touma Kamijou is an ordinary high school boy with terrible academic scores and a power called Imagine Breaker. Imagine Breaker can defeat any other power, but it also undermines Kamijou's own good luck. His Imagine Breaker's immense strength is literally immeasurable, so hapless Kamijou is listed at the supernatural level of 0. He happens to meet a girl in white hanging off his window balcony. The girl says she is being chased by sorcerers, and Kamijou learns that the girl is a Church of England nun whose memories have been forcibly replaced by Index-Librorum-Prohibitorum — the 103,000 forbidden texts of the Church.

The future cannot be changed! In 2019, former track and field club member Maki Makino meets a mysterious man with sunglasses on her way to school who saves her life. That encounter connects her to her past and future... Presented with overwhelming power, a 'boy meets girl' story opens here with unpredictable results!

The third part of the Gunnm series and set after Gunnm Last Order on Mars.

Gunji Akira, who has just started high school, has been chasing after his father's ghost by trying to become a police officer just like him. One day however, he has a surprise encounter with an alien while leaving school. And there begins the start of his fateful adventures with extraterrestrial life...

Note: It runs in a seinen magazine and will not be BL. At most, just as Fujobait as any shounen sports manga.

Spin-off Comic from "The World of Otome Games is Tough for Mobs" Starts! A kindergartener mob life comedy! Even when they're tiny, they're still female chauvinists!

To repair the singularity of the future, the main character, Ryuka Fujimaru, will shift again to lay down a tremendous battle. Kengoro Nishide of "Umehara FIGHTING GAMERS!" Breathes new life into "FGO".

20 years ago, Weve Aliens arrived at Earth to search for marriage partners. Weve are perverted and love interbreeding. With their advanced technology, they have solved all the Earth's problems to do with the environment, food, and resources.

Gen is a student at the prestigious Human-Weve school Shinryou Academy. Due to his late grandfather's words, he loathes Weve and believes that pure humans will eventually die out if something isn't done about Weves soon. However, Gen meets the Weve girl Mirika, who falls in love with him.

The second season of Cho Seok's Tidal Universe masterpiece, Planetary Human. So… prepare yourself to be mindfucked.

KUZUNO Sekai was transported to a medieval fantasy game-like world (isekai). He was given a game controller with the ability to stop time and a 3 days countdown timer. Now he has to figure out the mechanics of this game world and clear it in time.

It’s the end of the world as humanity knew it.
It’s a time where humans and humanoids co-existed.
A group of elite “phantoms” are sent out on a retrieval mission. The team is tasked with retrieving a stolen parcel. The team with a 100% success rate easily retrieves their mission and completes their mission, or did they…?

Insentient humanoids are humanity’s creation. Their task is to obey humanity’s commands. Humans no longer need to shed blood on the battlefield henceforward. Humanoids took their place on the brutal battlefield. Humans were safe in the rear, or were they…?

7 years ago a strange disaster occurred in the 24th ward when laws of reality were distorted in that area. Our main character is a high school boy who lost his little brother. Can Hanako-san from his school help him find his sibling again?

But more importantly who is this Hanako-san of the 24th ward?

Today, there’ll be discoveries and encounters again. For the girls marching forward in a world in its afterlife, there are still various things to experience: The remains of an extinct civilization, other living things, as well as lessons taught by the ruins.. there is still a lot to be seen in the world. That’s why... living is still fun!

The manga's story begins when a peasant named Hanbē asks a girl named O-haru for her hand in marriage, but O-haru confesses that she is already thinking of another man named Masakichi from a neighboring village. When Hanbē seeks out Masakichi, he finds that Masakichi possesses a sword and the skills to use it, despite being a peasant.

A love toy doll that is equipped with autonomous AI and behaves like a human being. They were forbidden to "love".
If you fall in love, the doll will be stupid. Still, they like someone. Is love a human privilege, or is it Science fantasy of dolls in love.

Science fiction action that begins with Boy meeting Gyaru!

The enormous cave system, known as the Abyss, is the last unexplored place in the world. Nobody knows how deep down goes this titanic pit, inhabited by strange and wondrous creatures and full of mysterious ancient relics which purpose in unknown to modern man. Generations of bold adventurers have been drawn by the cryptic depths of the Abyss. In course of time those brave enough to explore the dangerous pit came to be known as "Cave Raiders."

In Oosu, the town at the edge of the Abyss, there lives a little orphan named Rico, who dreams of becoming as great a cave raider as her mother was and solving the great mystery of the pit. One day exploring the murky depths she stumbles upon a little boy, who turns out to be a robot...

The high school student Kurashiki Midsummer has one of the best kendo skills in Japan, but she is not good at studying. Together with Tsumugi, an insect video distributor, and Ayano, an urban legend and conspiracy theorist, it was midsummer to receive repair from the first day of summer vacation, but at that time, a Self-Defense Force helicopter landed in the schoolyard. This was the beginning of the summer vacation which is super dangerous and too hot for midsummer!

A droid picked up an abandoned child and decided to raise it.