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.

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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...

Mysterious murders have been taking place in town lately and everyone is uneasy. Anne may look like an ordinary teenage girl in plain human’s eyes but she has something unique that attracts Vampires. May it be her blood type or even something in her skin that makes vampires so attracted to her? No one knows... One thing is for sure, Vampires keep coming in the city she lives in and they are even in her school now! Luckily for her, she has her brother to protect her and also one mysterious new guy...

The demon king has awoken after his 500 years long slumber and he tries to destroy mankind. Now a little monk has to travel to look for 12 warriors with powers of the 12 Chinese signs to fight him.

After his mother's death, Miwatari Yuu returns from Tokyo to live with relatives in the city of his birth, Ousuku. Yuu is the latest of a line of Shinto priests that stretches back generations.
After his arrival, he runs into a strange girl who seems to be searching for the Northern Lights. Yuu saw the Aurora as a child, though no one believed him, and his mother had told him it was the armor of the Valkyries traced across the sky. Yuu's destiny is interwoven with this mysterious girl and the aurora, and he will not be able to help being drawn into a battle that involves both gods and humans!

From Storm in Heaven and one of their legacy groups, Bamboo Feathers:

In ancient China there exists an alternate dimension called Jusenkai, whose inhabitants, the Senkaijin, possess tremendous powers. One of them, YanLang, fled to Earth along with his rebel army after being defeated during his attempt to overthrow the Emperor. In order to capture the fugitives, the Emperor sent his elite soldiers to Earth after them.

LiFang has been traveling alone to find his father's murderer when he picks up a sick and injured man. That aloof man, TuoRen, turns out to be one of the imperial soldiers sent to earth to hunt and capture the Senkaijin rebels. While his comrades work in pairs, TuoRen prefers to be alone. That is, until the strangely powerful human, LiFang, decides to follow him on his quest.

Note: The volume 5 extra is an unrelated short story, "Time Lag."

“Angel,” an experiment, escapes from the lab, and joins Hua Ye’s clan, where there's a 26 year old guy who hates children and nine hooligans. What kind of stories will unfold with them and Angel, who has always yearned for a family? Original Webcomic: http://ac.qq.com/Comic/comicInfo/id/521717

Eraser, the mysterious enemy that invaded Earth 13 years ago!! Before their overwhelming power, the entire Earth neared the verge of collapse. But at the last moment there suddenly appeared Earth's lone savior, The Beast: an ultimate weapon uniquely equipped to counter the Eraser's power!! The Beast is part of the MAGIC Brigade, whose commander-in-chief is also the founder of our Le Prince Academy... Ladies and gentlemen, I present to you, Mr. Vincent!

From iskultrip Scans:

Uemura Takitarou is a Genius Cosplayer who can change himself from head to toe. One day, he finds his only friend, Asami Kusaka, killed by the Night Blindness Man, a serial murderer who gouges out the eyes of his victims. Tominaga Hana, a model, discovers his talent and recruits him for the company, UC, an office that solves mysteries and crimes by manipulating rumors/urban legends. Can Uemura track down the person who killed Kusaka?

From MangaHelper:

In a land far away, the evil demon lord ruled with absolute power and cruelty. But a group of heroes combined their strengths and conquered obstacles to finally reach the demon lord in a final fight. When the sorcerer cast the imprisonment spell that was supposed to trap the demon lord, it also dragged all the heroes into a different dimension.

The demon lord, who looks and acts like a teenage girl, has lost her legendary powers and is forced to rely on the heroes to find a way to escape the prison. The sorcerer, who is leading the search on how to break out of the spell, can’t help but to tease the now powerless, bratty and emotional demon lord that once was a threat to the entire world.

From Easy Going Scans:

In a far place in a far country there’s a mansion where a demon girl lives. One day there was a huge storm outside, so in order to protect himself a mysterious boy named Adam enters the mansion. And so they meet...the little demon girl and the mysterious boy that looks like a shinigami, both outcasts in the human world; they decide to create a school for monsters together!

From Fujoshi Bitches:
“Tomorrow, I’ll put a curse on my father…”
Right after reuniting with his father, from whom he’d been separated when he was a kid, Ryou suddenly traveled back in time 22 years, during the peak of the bubble economy of the Showa era!
There, he met his father, Konomi, who was 3 years younger than he was…!
Living in an unknown environment with the uneasiness of wanting to go back to his own time, Ryou was anxious. But being comforted by the pure-hearted Konomi, his feelings gradually started to change… The first volume of Ike Reibun’s loved original work!

A deadly virus is spreading across mankind, turning humans into gruesome monsters known as ‘Kanshu'. Yet no one knows of their existence, except for the organization called ‘F.L.A.G.', dedicated to hunting down and destroying the source of the infection. Its members possess extraordinary powers, capable of unleashing righteous fury on their enemies.
One day, a cell phone message from a dead relative leads estranged youth Riku Amami unwittingly into the conflict between F.L.A.G. and Kanshu - and to a mysterious cocoon that would change his life forever, for better or worse…

Kojiro Suzuki (Protector: Ifrid) belongs to the Discipline Monitoring Committee of a high school for kids who have a stronger than normal "Divine Protection." He works hard every day to clear all sorts of trouble. On top of that, he's constantly pursued by the stunningly beautiful D.M.C. Chairman Lauri Asagiri (Protector: Leviathan)...! This is a "metamorphosis love battle" between a super beautiful and feminine top and a stone-faced, handsome bottom with a dark past, unfolding in a fantasy-style high school!!

*Let me explain! Divine Protection is a power all humans possess since birth. There are various kinds of protection, based on the original protector and their powers: angels, demons, holy beasts, demon beasts, spirits, and so on. Individual power is generally low, but in some rare cases there are people with strong Divine Protection...

from Renta!

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Suzuki Kojirou (his Kago is Efreet) is a member of the public morals committee at a high school which gathers a lot of students whose “Kago” powers are stronger than normal people.

But, for some reason, he’s being pestered everyday by the super beautiful president of the public morals committee, Asagiri Lauri, (his Kago is Leviathan) who always has to run around solving all kinds of problems within the school because of his strong power.

Pushy Seme × Expressionless, handsome Uke. The fantasy campus unfolded. Metamorphic・Love・Comedy❤ Love developments! Drawings and new stories enclosed☆

- from Canis Major Scanlations -

Every 666 years in the Demon World, a fight to decide the next King the "Demon King Festival" is held. It is a battle royal fought with demons paired with human sorcerers. The demon Aini, carrying the desire to be King in her heart, quickly responds to her summoning in the human world, but what awaited her was.

From: Easy Going Scans

The story begins to unfold in 900-960 AD, later Zhou dynasty, when Chi Wu is being imprisoned after purposely losing to the emperor. His true goal lies within the prison itself, a clue to the whereabouts of world's greatest lost treasure-- Qi Lin Treasure. The words of his capture quickly spread to the ear of his senior and a former officer of the imperial court. Tie Zong Heng (Lawless), decides to be re-enlisted to the imperial services just to hunt down Chi Wu.