"I am a gatekeeper. I guard a very old castle..."

A lone gatekeeper stands watch outside of the Lost Castle. All who enter the castle he never sees again but he cannot warn them for he is cursed. Then one day a beautiful girl wants to enter! What will the gatekeeper do? What is the secret of the castle?

Original webcomic:
In Helios, 6 warriors go on an adventure to search for the magical jewel “L.”

They thought they were inseparable. A terrible tragedy kept them apart. Forever? Unhappiness always strikes when you least expect it. And when it leaves a gaping void in the heart, how can we continue to live as if nothing had happened?

One day, your average run-of-the-mill loser begins to see a 'cursor' that's pointing at certain things. He devotes himself to following the instructions he gets from this cursor, progressively becoming stronger - and more reprehensible - as he goes along. But where will it lead him in the end?

(Source: MU)

A queen with an entire class in the palm of her hand, striking fear into the hearts of her subjects with a single glance. 'This is wrong,' they think to themselves - 'This is not fair. We are all equal.' - so why is it that not one of them speaks up? If silence is our answer to tyranny, then who will help the helpless?

(Source: MU)

Class rivals June and Lucia vie for the honor of being named the Queen of Light, entrusted with protecting the people from the King of Darkness. June is an attractive girl whose feisty, hot temper and general laziness may prevent her from receiving the crown...Lucia has a more regal quality and a strong desire to match, but she is always overshadowed by June. Will petty jealousies, love triangles, and one cute boy interfere with the Queen's royal duty?!

You-Geon is your average high school student. One day, however, he's saved from drowning by a girl his age. This girl happens to be a North Korean agent that infiltrated You-Geon's country. When he learns her secret the girl is determined to stay by You-Geon's side at all times to make sure he doesn't tell anyone about her identity.

Lost in the mountains on a trip to summer camp, eight-year-old Si-Joon fears he’ll never make it out alive. When a strange girl in a pig mask appears before him, he follows her to a house deep in the woods, where he is told that he must marry the pig-faced girl to atone for the sins of their ancestors. Si-Joon’s not too keen on getting married, but that wedding feast looks so delicious! It’s only afterward that he realizes what he’s done and …wakes up. Now in high school, Si-Joon Lee has been dreaming about the pig bride for as long as he can remember. But it’s all just a dream, right?

read from left to right ^_^

70 years since the end of the Korean war, July 27, 1953.
70 years on, a new conflict arises in the Korean peninsula.
The powder keg of North East Asia is lit by a small ember...

Yoon Jongwoo, a country boy, comes to Seoul and boards at a goshiwon - a small, cheap room for rent, usually taken out by poor students. This is the tale of his strange encounters at this goshiwon. (Source: Anilist)