From Tokyopop: Daughter of a brilliant professor, Asuna is a below-average student at Ecole du Ciel, where teachers and other students constantly belittle her. However, with the world spiraling toward war, Asuna's headed for a crash course in danger and love, as everyone prepares for combat...

"I'm jealous of you..."

A girl from a robot club in a wheelchair, Futagami Yui, looks up to heroes and wants to create one, so she enlists the help of an underclassman, the talented AI architect Kazumiya Reina, to build an android together. When it's almost finished and only the AI needs to be sorted out, someone kidnaps Reina. Yui curses her inability to do anything because of her legs and resolves to perform an illegal "mind copy" to save her junior...

This is the log of adolescence of girls living in a world where humans and androids coexist.

In the future, Earth has become so polluted that humanity is forced to live in enclosed shelters. In Japan, the shelters are divided between the "inside", which caters to the country's lucrative anime industry, and the "outside", where most people work to support the people working on the "inside". S-zawa is one such "outside" worker whose job involves sending messages into space. One day, he's approached by the ailing embodiment of Earth to send a message before she collapses. Shortly after the message is sent, other girls similar to Earth start showing up at S-zawa's workplace in an effort to help Earth, but he has a thing or two to learn about what the planets and their moons are really like.

Witness the origin of Mega Man, his first battles with Dr. Wily and the evil Robot Masters, plus appearances from Dr. Light, Roll, Proto Man, Rush, and many more Mega Man favorites!

The manga tells the strange tale of cigarettes in robotic human female form who expel tobacco from their kisses, much like regular cigarettes would.
The male main character, who has never kissed anyone before, slowly adjusts his life around his new cigarette girl and newfound "addiction".

Technology leads to a continuous evolution of violence; this age of chaos gave birth to heroes.

In a not-too-distant future Japan, Akira, a high school student, has an uncertain future and begins to give up on his dream of studying robotics in college. Meanwhile, Tom Rock, CEO of the global robotics company Rock, Inc., is trying to put into place plans he's had in preparation for years. The fighter "Automaton" was developed to bring salvation to a world that has started to go crazy! The two of them meeting is the beginning of this story!

In the 27th year of an alternate Meiji era (where the kanji used for "Meiji" mean "maze"). A self-proclaimed samurai named Naguri travels from the countryside to the capital Asakusa to achieve his dream, and he moves into a share house. In Asakusa spirits, samurai, and technology coexist.

Kayano Meguru has a bit of a brother complex. Her love for her brother is so strong that she has removed the idea of any romance with any other male other than her brother from her mind.

One day she passes out and awakens 2 years in the future! To make things even more confusing for her, she is dating someone other than her beloved brother!

Follows the daily life of a professor and a robot girl in a post-apocalyptic setting.

From MangaHelpers:
In the near future, aliens from Bluto “invade” the Earth. But what is their objective? To steal all of the timed sale groceries at rush hour and make perverted havoc among the citizens. Not the kind of aliens you would find every day. To counteract this “terrifying” enemy, a special force of heroes, “The First Star Heroes,” has been sent out wearing dynamic colors. But, out of the five heroes, two of them have a secret. Momose Kaname, a 14 year old boy who has idolized these heroes, is transformed into the team’s Pink Hero and now has to hide his identity. And “he” finds out that the Red Hero of the team is actually a girl who has experienced the same gender-bending transformation as Kaname. What will happen to these Heroes, especially Kaname, as they face all kinds of odds during their “heroic” days?

From Decadent Descent Scans:

Since he was young, Chiwa has been dreaming of returning to the Underground. He finally succeeded by joining the Special Forces unit of the police.

"Great Raven" is made up of mostly Enhanced Humans who have unique abilities. Their mission is to track down members of the crime syndicate, Joker, and stop it from kidnapping and altering children's bodies. But Chiwa is completely unprepared for the things he finds in the Underground.

Year 20xx. In various parts of the world, there are gates that connect to another world. There are tens of thousands of demi-humans and monsters living in Tokyo alone and various services have been established to accommodate the residents from the other world. One such place is the real estate agency called Ebisu-ya. (Source: Mangaupdates)

Kamiwazumi Jun lives alone in an old house with a shrine. As a result, people sometimes leave random things outside his house, like kittens... or an unconscious naked girl?! The woman in question claims to be a robot from the future who has come back in time to protect Jun, the future messiah. She has no qualms about nudity, and retrieves useful objects from a "9th dimensional pocket" between her legs. Once Jun has accepted that her story must be true, he also has to figure out how to work a sexy robot girl into his everyday life, which also includes explaining her to a cute childhood friend that has a crush on him.

As humans and demons continued endless wars, the mixed forces of various races, the anti-human allied special operations unit and the cross company, were developing local battles in a dense jungle. The captain of the third company, Dill, is bringing up children while running on the battlefield. It is a nemesis child to defeat. It was a small little human child.

Winner of the 1991 Seiun Award for Best Comic.

The manga is based on Atlus' Shin Megami Tensei: Deep Strange Journey Nintendo 3DS game, and will tell an untold story in the game's world.

1) Machina Angelus - Angel's Temperature
Yuya was all alone after his grandfather passed away. Then Kou, his childhood friend, who abandoned Yuya reappeared back in his life. Unbeknownst to Yuya, Kou has a debilitating disease that forced him to leave his side. So in order for Kou to see Yuya again, he decided to become a Machina Angelus (Machine Angel), a machine he founded! Will the single-minded determination of a genius create a miracle?

2) Machina Angelus - Angel's Oblivion

3) Spicy Hot Life
Osawa Takatoshi is alone, his father left the family years ago and his mother is deceased. Now, Death God, Black, arrives at his door with a ring in his hand and a desire to eat curry. How can a Death God and a human find true love? And if they do, will they be able to stay together?

Extra) God's Left Hand

An unknown alien enemy attacks the Earth and the armies on Earth must try to hold off the invasion. It is based on the story for the SNES shoot-em up game Super Aleste.

This is a story that takes place in a certain prefecture in the north. In contrast to the few daylight hours it gets, its people are cheerful if a bit eccentric.

Among them is Akita, a horned girl. A naturally argumentative and positive child, she lives happily every day. Spicing up her life is Asahi, her slightly odd childhood friend, and Komachi, a city girl who isn't quite used to life in the prefecture yet. There's also Akita's older sister, a member of the Girl Scouts... Wait, what's her name, again?

Anyway, these cheerful and innocent girls will bring a smile to even zombies. Whenever you're feeling blue or tired... give it a read. With any luck, their antics will cheer you up.

1000 years ago, a war between humans and space witches ravaged the stars, destroying countless planets and taking even more lives. Eventually, the humans captured the most powerful witch and imprisoned her as a war criminal under the treaty. The castle where the Magic Lord is sealed away is watched over by a village where everyone has developed weak magical powers- everyone but Mugi that is. Determined to prove that he doesn't need magic, Mugi accidentally flies into the monster-infested forest surrounding the castle and is saved by a girl that he has never seen before...