Original webtoon (Korean webcomic)

A freshman in college, Amano, is taken a liking by a mysterious senpai, Kamishiro, who raises chicks. When Kamishiro hugs him out of nowhere in their first meeting, he thinks this senpai is crazy, but as he spends more time with him he sees how kind he is. But one day, while Amano is playing with the chicks, Kamishiro kisses him out of nowhere! An airheaded research student and a kuudere freshman's love story.

Hokuto Kuzuhara is a delinquent known throughout Sekai Private Academy. His way of life being so hated by his family that they give him an ultimatum: find a girlfriend within a year or move out. That said, though, months pass and he still has had no luck and it seems like he never will. It is then during this predicament that he is approached by the student council vice president with a plan that would both save him from moving out... As well as help her with her revenge.

Hito Natsu no Kids Game (ひと夏のKIDSゲーム Hito Natsu no KIDS Gēmu) is a short, debut manga work by Ken Akamatsu, the creator of Love Hina. The manga was published on September issue of Kodansha’s Magazine Fresh on September 10, 1993. Ken Akamatsu later received Kodansha’s "Freshman Manga Award" (Japanese: 新人漫画賞/少年マガジン新人賞) and Special Jury Award (Japanese: 審査員特別賞) for this work.The manga was re-published on 20 May 2001.

(Description taken from Wikipedia)

Mamoru is a Nishiarai game player who has switched to a first-class powerful new high school named Hijiri Gakuen Koukou. There he met with a group of eccentric game lovers who call themselves Dennou Kenkyubu, he accidentally joined and had to undergo a variety of events and adventures with them.

Spin off of Hitsugi no Chaika. Takes place in high school.

From Winter Translations:

This is a story about a pair of twins who're, undeniably very different from one another. Big brother Shuuya and little brother Yuuta are basically light and shadow...

Touge Yuugiri is a chick magnet. Without lifting a finger, girls vie for his attention, "accidentally" topple on him, or even invite him to spend some special time alone—it's almost as if he is the protagonist of a harem manga! But Touge could not care less about the attention, as he is gay and feels nothing towards the opposite gender's affection. Yet all his attempts to escape, reject, or scare them away have the complete opposite effect, only intensifying the girls' admiration—as if some cosmic interference was at work. Bombarded by nonsensically perverted situations and unwanted sentiments, Touge's life spirals into a living hell, truly reflecting how one man's dream can be another's nightmare.

From Loveless' Site:

Amidst the crowds in Asakusa district, Tokyo, a young man is assaulted by a group of bandits. When a red-haired stranger comes to his rescue, Suoh falls in love at first sight, but all's fair in love and war.

Madam Misa dies mysteriously at the Saturday Night Club. Soon after her death, her young handsome and broke host Hideo opens a similar looking "Host" Club of his own. Where did the money come from? Did Hideo have something to do with Madam Misa's death?

A spin-off focusing on Princess Pinya's (from "Gate - Thus the JSDF Fought There!") life before the "Gate" opening to the other world event.

Hime Arikawa is a high school boy with a huge debt, and he is saved by the girls of his school's student council after being chased down by yakuza debt collectors. The student council agrees to pay off his debt if he'll join the student council and spend his high school life cross-dressing.

Future-Retro Hero Story is set in the same universe as Outlaw Star--in fact, it is the origins of the Towards Stars setting. A pulp science-fiction series with plenty of humor, action, and adventure to go around, it's the story of Juji Godoh and the ship he inherits from his grandfather, Captain Roger Fortune!

Mi Ju, the most beautiful cosmetic model of CF, and her school friend Yu Jin, are thrown to the past where at that time people's opinion about beautiful woman are different from nowadays. Mi Ju who is loved by her beauty and body height, in those times was considered as 'ugly woman'. They must find ways to get back to the future if they don't want to live in those times forever.

Long ago, in the far reaches of space, there existed a world as pure and blue as the Earth. And on this world, there lived two "Queens" with the power to control it. When the world is thrown into chaos by one of those queens, a young boy and a young girl must stand up to challenge her for the sake of protecting all that they hold dear.

Note: TSP is using the tankobon chapter numbering (where ch. 12.5 is ch. 15-17 in the magazine raws) compared to groups who previously used the magazine raws.

By all appearances, Sakura and her friends are normal, albeit sheltered junior high school girls who enjoy talking about love and walking home from school together. However, they also happen to inhabit a strange and supernatural world populated by mysterious, gigantic beings and unusual plant and animal life. Amid their peaceful lives, Sakura becomes very interested in something only alluded to exist in an old book: dicks.

A collection of stories:

• Otonari no Senpai
• Fuwafuwa no Kimochi
• Hajimari no Kotoba (also in Kirakira no Natsu)
• Hon no Tomodachi
• Mainichi no Tomodachi
• Christmas no Yoru (The Night Before Christmas)

Ishikawa Ginji hates anything related to ghosts, superstition and the occult with a passion. His "occult phobia" is so intense that he does not hesitate to reject any girl who appears to have even the slightest interest in the subject.

One day, after a particularly intense reaction to a haunted house lands him with a 600,000 yen debt, he is suddenly kissed by an elementary school student named Ageha, who then explains that she will use him to "wipe out every ghost in the world". While the sex appeal of the kiss is not enough to turn Ginji to her side, the fact that she "bought" him by paying off his debt in one go seems to work just fine.

From Hearty Thrills:

Meguna Hirasawa has confessed 5000 times in total to her 10 year long crush Ayumu and in turn, received 5000 rejections. But that won't stop her. In fact, Meguna is retiring from simple confessions and moving to a whole new level. That being said, Meguna is ready to dive straight into seduction! Wait, the first thing she does is smash her lips into Ayumu's face for a bloody kiss?! Will her pestering finally allow her to capture Ayumu's heart? Or will this desperate girl's hard work be in vain?