From PRISMS:
Wahhaman is a special robot soldier built ten thousand years ago by the Atlanteans. Found and dug up in present-day Toukyou, he doesn't remember anything, due to a nasty knock to the head he received at some point.

Half a century ago, the human race was attacked by an enemy from the sea known as the AUS. When Reiji Shiroyama was little, he was unable to protect his sister from the AUS because the gun he tried firing jammed. Since then, Reiji refuses to trust guns and only trusts his fists.

Masaki Masamichi has his heart set on joining the legendary manga club of Takidani High School. After all of his effort to get into Takidani High School and prepare for his club entrance, he finds out that a horrible change has happened to the club of which he dreamed. How will he cope with the disappointment of learning that his long-awaited club life consists of drawing ero-manga?

Haru visits Canada to spend the summer holidays in the woodland house of his strict, strong-willed mother, Haruko. There, she burdens him with the responsibility of caring for his younger adoptive brother - a wild and unruly little boy named Ren who trusts no-one and prefers to wander in the woods with Haruko's dogs rather than associate other people. Haruko orders Haru to 'civilize' Ren. As the young man strives to teach Ren how to live in human society, their relationship gradually improves - so much so that Haru plans on taking his 'little brother' to Japan with him once he finds a job.
Unfortunately, fate has a cruel habit of interfering with one's plans.

From Memory For You: Kunimi and Hideaki are childhood friends. But lately, Hideaki is behaving coldly towards Kunimi. Why?

Published in 1980 in Shounen/Shoujo Sf Kyousaku Daizenshuu

A rare, 4-page one-shot that’s never been reprinted!

2000 years ago, there was a battle between a warrior and the demon king. Through this epic battle, the demon king won.

Now, there are kids between the ages of 12 through 18 that are direct descendants of the demon king. They each have unique transformation powers that allow them to turn themselves into varying monsters, such as slimes and golems. Imaichi Butsuko and Hinase Suiren are both one of these monster kids.

With the impending resurrection of the warrior, these kids enjoy their daily school lives while preparing for battle!

From AOC Translations: A fast-paced heart pounding, and dangerous sonic love story!

Hina is busy managing the Apricot House in place of her father, but Anzu, the strange boy who lives in room 304 is quite the troublemaker.
One day, Hina accidentally breaks Anzu's keyboard and instead of asking Hina to pay for the damages, he asks her for favour after favour after favour! While this goes on, Hina discovers that Anzu is actually the charismatic vocalist for a super popular band!!! Is the lame weirdo that Hina knows the real Anzu? Or is the cool guy on stage? Hina's everyday life is changing rapidly.

From Paper Dolls Project:

Instead of her father, Hina is the one running the duties of the Building Manager in "Apricot House". One day, she accidentally destroys the keyboard of Apricot House room 304 strange resident. Hina is then asked by this strange guy to run errands for him as reimbursement. In truth, the strange guy residing in 304 is the charismatic vocals of the popular band ...... What will be his true face!? Chicks usually will change rapidly in the face of a cool stage -! Slowly, the world that Hina knows is changing. Experience this speed ​​of sound love story!

A psychedelic romp featuring an ordinary high school girl and her encounters with the very odd guys who somehow always seem to gravitate towards her.

The official spin off of Ao no Exorcist.

16-year-old Murai Masahiko is a fat, ugly, gaming-addicted social outcast with a fetish for the smell lingering around a scumbag in his class. When a beautiful girl named Mizusawa Haruka transfers into his class, one thing leads to another and they start dating. But there's a truth that Murai is all too aware of: Mizusawa Haruka died five years ago.

A seinen manga from 1979 (R-18)

I Love You yori Aishiteru (I Love You More Than "I love you")
Honour student meets delinquent, and an unusual relationship begins.

End-of-volume extra: Onaka wo Sukasete Kaettekuru Ne (Come Home Hungry)
A crybaby who always gets picked onto sports teams because of her height but can't score to save her life, and her cool-headed childhood friend from the cookery club.

Having given a magical Tengu mask to a human boy when she was little, Tengu princess Arazunaya Jirou is told by her father to go get it back. Nariyuki (the boy), now a high schooler, doesn't want to give it back. Slapstick comedy ensues.

From Overload Scans:

Manaka is good at archery, but she hates it because her father forced her into it and the other members of the high school archery club hate her for being better than them. While she’s feeling down, she gets caught up in the battle between a gun-wielding woman and a tank, after which she succeeds the woman’s magicannon, a device that lets her turn into Yongou, the personification of a WW2-era tank. With her newfound meaning of life, Manaka and the new friends she meets take on the Nine Old Guns from an organisation that may be striving for world peace or world destruction.

Eriko Ichimura spends her high school days in complete obscurity. Her sole hobby is staring at handsome, smooth-spoken Akira "Omi-kun" Ohmi, and tweeting her daily fantasies under the screenname "Lovesick Ellie." One fateful day, she accidentally bears witness to Omi-kun's true self — and if that weren't enough, he sees her mortifying Twitter, too! Follow along with a plain, perverted girl, a two-faced boy, and their curious romance! [Kodansha]

Playful children invade a young woman’s peaceful apartment… to what end?

In the future, Nikola Tesla's dream of a 'World System' of electricity is realized. Cords and batteries are a thing of the past, and now people can directly draw energy using devices known as 'coils.' Some people, however, modify these coils for destructive purposes. Mabuchi Kyoma, a man who lives in ruins and has a passion for 'vintage' gas-powered cars, has good reason to know what damage these coils can do. He takes on assignments from a fat woman known as Marie, recovering illegal coils in exchange for cash and gasoline. One day, he goes out on one of his usual missions, to retrieve illegal coils from two criminal brothers, Jony and Every Won. When he gets to their gang's hideout, however, there is another stranger there: a mysterious, cloaked captive that appears to be a young lady. Who is she and will this meeting change Kyoma's life?

"An anthology of an adult puffing at blue smoke quietly" Various well-known mangaka look into the theme of cigarettes and smoking.

Arion, a young man, is kidnapped by Hades as a child, raised to believe that his mother was blinded by Zeus, and that killing the ruler of Mount Olympus will cure her.