The manga and the movies of the same name are both based on the Onmyouji novels by well known Japanese science fiction writer Yumemakura Baku.
All three concern the adventures of Abe no Seimei, an onmyouji (magician) serving the imperial court during the Heian period and his friend nobleman Minamoto no Hiromasa. Both men are historical figures who appear in various sets of tales. Many of the early chapters of the manga closely follow stories in the Konjaku Monogatari or Uji Shui Monogatari.

Note: Won the Tezuka Osamu Cultural Grand Prize in 1997 and the Seiun Award for best comic of the year in 2006.

From SaltyPotatoesTrans:

Kanou Hiroto, a high school student, experienced sexual harassment when he was a child which led him to be allergic to men. Due to this, he isolated himself from guys until he met Ohshiro Kei, who approached him without knowing about his allergy to men. Ultimately, Kanou struggles as Ohshiro relentlessly pursues after him. Will Kanou accept this twist of fate to his life?

From Chibi Manga:
You like that person right? And that’s how it started. A shuttering, saddening, deep pure love story will start.

Born a humble peasant, Kihara Mei has lived simply day by day as a merchant in the capitol, and never assumed things would change. But, one fateful day would change the course of her life, when faced with a deadly challenge against dangerous royal assassins. Now, with the eyes of the dreaded Blood King upon her, her life of simplicity would now become a tangled web of secrecy, deceit, and desire.

At the end of the twenty-first century, a rare disease named "Cagaster" began infecting the human race — transforming them into massive insects. Two-thirds of Earth's population had been devoured by these insects before humanity came to a decision: those that were infected must be exterminated.

In the year 2125 — thirty years after the discovery of Cagaster — a young exterminator named Kidou finds a man dying from insect-inflicted wounds at the edge of the desert near the insects' "cage". The dying man entrusts Kidou with his daughter, Ilie, and tells him to seek out the girl's mother.

A vampire hunter learns of a mansion inhabited by a vampire who's rumoured to have kidnapped children and goes there intending to take him down. But then it turns out that the vampire's a wimp who keeps turning into ash at the smallest things... And that the kids aren't being held captive, they're just using the "haunted house" as their personal playground.

Plagued by visions of a psychopath after a slaughter in a busy street in downtown Ikebukuro, Madoka must question her own sanity as to whether what she is seeing is actually happening.

Hotaruda is a budding shounen manga artist. His manuscript was rejected after visiting several publishers and was then referred to an ero manga publisher instead. Right after getting the job, he learns that his new editor Kayama is a masochistic pervert.

A hero is reincarnated in a different world. He gather together orphans and starts a farm. Over time as more children arrive, the farm becomes a village. Founding a orphan village in another world.

Orginal Webcomic

Jang Jiheon, a businessman, falls in love at first sight with Geon during a snooker game. Jiheon's unbearable desires force Gon to spend the night with him. Geon desperately runs away when Jiheon is revealed to be a violent and oppressive man. Then one day three years later, the two reunite in an unexpected way... (Random Fujoshis)

Yukari had finally saw the true face of her senpai she has a crush on, and it was not that great. When she comes again to his Japanese sweet shop to buy some sweets, she also finds a nicer side to him. Cherishing her alone time with him, she starts to fall for his true self. What will happen when other girls also find that nice side to him?

A prequel series revealing Goblin Slayer's past and the events that led him to become an adventurer with the sole purpose of exterminating all goblins from the world.

Kang Chan and Seyeon have been close friends since they were young after being introduced by their parents. After entering high school, Seyeon suddenly received a confession from Kang Chan and became aware of Kang Chan since then. Meanwhile, Naeun is displeased with their relationship. The trivial and noisy story of their love triangle and those around them...

A teen who is worried about growth, love, and of friendship.

An all-female family manages a small inn on a small island. Mother, aunt and 4 daughters are all very intimate with each other and wish to help their (female) guests to unleash their own yuri feelings.

Whether it is a fantasy or a real ghost, Hyunwoo keeps seeing Jihye, his dead girlfriend whom he dated for 10 years. The car accident happened right in front of him, and from that day on wards, he lived the life of a hopeless nut job. Hyunwoo's mother, who's on the verge of giving up, decides to set him up for a blind date. Things happen and Hyunwoo agrees to meet the woman his mother set him up with. Her name is Jimin and she turns out to be a dead ringer for Jihye. Rattled, Hyunwoo gets drunk and keeps on overlapping Jihye's image with Jimin's. Until finally, in his confusion, he kisses Jimin. Will Hyunwoo realize Jimin's deepest secret? What will happen if he finds out about it?

By Random Fujoshis Scans

Kangha lost her boyfriend, her job, and, most recently, her bike. And just when things were at their worst, she meets her neighbor. Tall, handsome, mysterious... in a word, perfect. That is, except his tendency to transform into a frog.

From honyakusha:

By coincidence, college student Morimoto reunites with his former teacher, Jinno. After having a meal together, Jinno is touched by Morimoto’s home cooking, and they end up eating together almost every day! However, sometimes when they’re enjoying their meals, Morimoto will have a sad look in his eyes. Jinno may have forgotten, but he’d dismissed Morimoto’s confession in the past…

His body has different abilities, but he has not found any way to use them in the real world, all he can do is to be a professional killer. But at least after going to a different world, where there is only fighting or death in the battlefield its strength will appear differently. His name is Tang Yin...

It is the 16th year of the Meiji era. Five years have passed since Kenshin Himura stopped the uprising of Makoto Shishio. Though the flames of his budding revolution were extinguished, the scars left in its wake are still felt across Japan. Remnants of his group—though scattered—still exist. Some have found peace while others continue to fight.

After a remaining faction tried to revive the revolution, Shishio's old sword fell into the hands of Ashitarou Hasegawa, an orphan boy who has never known a home. The conflict also leaves both Aran Inoue, a 16-year-old half-Japanese, half-American boy, and a mercenary girl named Asahi Kubota with a hefty price to pay off, with nowhere else to go. But luckily for these individuals, the Kamiya dojo has always been a place to accept wanderers without prying into their pasts.

The three are keen to start fresh, so when two members of Asahi's former clan show up demanding her return, Asahi refuses and things start to get ugly. In the midst of the chaos, the clan members drop a package containing a picture of dojo proprieter Kaoru Kamiya's presumably deceased father and his location—Hakodate, Hokkaido. With only this information, the members of the Kamiya dojo embark on an adventure across the sea in the hopes of finding news about Kaoru's father and the reason he is being targeted.