From Sura's Place:

Boring days, boring life. She wants her life to spice up with a mystery or two.
She gets her wish.

And epic sci-fi story heavily influenced by the Epic of Gilgamesh, as several groups fight for a mysterious power. While a close brother and sister get tied up into the battle unwillingly.

A young girl answers the door late at night and looks up to see a very, very tall man standing before her.

Your not so standard boy-meets-girl story. A young engineer builds a new wing for a wounded angel.

From Canis Major Scanlations:

On a class trip to a museum, Kasama takes notice of his classmate Takagi, who he knows doesn’t talk to other people much. But as the latter enters a curiously shining door and realizes Takagi can see "it" as well, even his interest in the classmate is woken.

Tamami-san is a bakeneko, an immortal cat-human, seeking revenge on all the descendants, to the seventh generation, of the man who scarred her for life. But to hunt down those descendants, she needs money. For money, she needs a job. Days in the office, nights out hunting. No wonder she can't stay awake!

The occult mystery story follows the Norse god Loki after he is exiled to the mortal world in the form of a human child. He must collect auras of evil in order to return to the world of gods, so he runs a detective agency to accomplish this.[ANN]

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.

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

Published in 1980 in Shounen/Shoujo Sf Kyousaku Daizenshuu

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

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.

Some are chosen by the 3 guardians of the Universe that protect the balance of all worlds and to stop a great evil. These soon to be heroes are selected from different worlds and are gifted supernatural abilities and unique weapons to fight of The god of all evil and his force and take back the keystones which hold the source and balance of worlds.

He that kills sinners. he whom carries five blades feels no remorse upon walking with the dead. It is his duty to live forever and find all those who have sinned.

When all the doors open, the world will slip into chaos... Only the twins Clalisa (open) and Mizeria (close) control the Four Doors that protect the world from descending into chaos. When Rihitel, their guardian, kidnaps Clalisa, he weakens the Door of Chaos and demons begin to pour through, threatening to destroy the entire kingdom. Will Mizeria find her sister in time to close the door and restore order to the world?

A shounen story where 2 teenagers went back in time to the "Three Kingdoms" period of China. An entertaining action series with some light moment & a bit of romance. You also get to learn a bit about that era.

From JanKenPon:
Middle schoolers, Shiro and Masumi, encountered a mysterious dragon that brought them back to the time of the Three Kingdoms; situated in ancient China. As soon as they arrived, they were rescued by the Han Kingdom. Not long after these events, Masumi was kidnapped and Shiro barely escaped death... Soon the story gets more complicated as they are stuck in the past.

In 1997, Ryuurouden won the Kodansha Manga Award for shōnen manga.

N/A

It's the year 2034 and high school student Sasaki Hiiro boards his bus just like any other day. Everything changes, though, when his bus is suddenly attacked by a mysterious girl with red eyes. When Hiiro awakes, he finds himself in "Tokyo," a city which was supposed to have been permanently sealed off after the outbreak of the deadly Pandora Virus ten years ago. Not only that, but it also seems like all those being gathered in "Tokyo" are developing new inhuman abilities. Now, among the ruins of Shibuya, Hiiro and his friends must discover why they are here and learn all they can about the terrible Malicious Code that is running wild in their bodies before it destroys them all!

From Seven Seas:

Tor Kokonoe has entered the prestigious Koryo Academy, a high school dedicated to training its students to wield Blaze―individualized weapons that a student manifests. The future of a student is often shaped by the form their weapon takes, and when Tor’s appears as a shield, suddenly he’s the odd man out. But that’s when the Duo system comes in, a program where students are paired up. Teamed up with a silver-haired girl named Julie Sigtuna, Tor’s adventures at Koryo Academy are just beginning!

A gullible girl, a troubled adult, and the God that watches over them... The heartwarming chronicle of growth between the three of them as their daily lives entwine.

The young adopted Mi-Chan, confused by a town she is not used to, encounters the adult blacksmith craftsman, Ken, and the smithy’s God, Kitsune. This encounter will help her heart grow. Though, this growth will also become the flames of change to both Ken, and the God, Kitsune...