Asakura Kosame is rejected by the girl he likes. He bought a guitar and created a song solely for the confession on his graduation day in Junior High. Unfortunately, the girl likes another cool boy from another school, whom happens to be a member of a band.
Later, Kosame enters Meirou High. He decides to join a music club and become great to show it to the girl whom rejected him for revenge. But, it turns out there is NO music club at Meiro. The one who sees him at that time is...

In the Pretty Babies series:

Part 1 - Pretty Babies (1 Volume - Complete)
Rookie detective Chikara has been assigned to the close minded, hard-faced senior detective Ibuki, One day, Chikara, who had tailed Ibuki in order to uncover his secrets, witnesses Ibuki carrying a suspicious heavy bundle out from a church. Then, after almost being run down by a car, Chikara is asked to spend the night with the beauty who'd been driving in lieu of compensation...?!

Part 2 - Heavy x Beauty (3 Volumes - Ongoing)
In the middle of the night, Ibuki suddenly calls on his superior Kiriya. Both work at the Metropolitan Police Department and have been dating each other for the last three years. One day, Kiriya's uncle proposes to headhunt Ibuki, and talks of Kiriya's own arranged marriage introduction.

"Hmm, I guess it's high time." Kiriya sighs upon receiving a phone call from former bad company...

Dong Nu was an ordinary beautiful girl in her junior year of high school. After an accident, she met a very powerful yellow-haired man. Although his behavior was a little eccentric, he attracted her attention. As she learned more about him, she began to discover that this man had a shocking identity, as he was not just an ordinary mortal... In fact, you might even call him a... Original Webcomic: http://ac.qq.com/Comic/comicInfo/id/524373

After her mother's death, high schooler Mi-Hyang packs up her belongings and enters the household of her mother's formal manager. Even though she was a daughter of a rich man, with her father and other family members still alive and well, she apparently has good reasons for doing this... So the life of smiling 24/7 Mi-Hyang and the two good-looking sons of her mother's formal manager -- with their own set of unique personalities -- begins!!

From Yaoi Is Life:

Hiroi always shared what he liked, things and people alike, with his childhood friend Take. Take always returned Hiroi's affections. Mine, who because of his deep love for Hiroi, accepts both of them. The relationship of these three classmates was in a good balance, but because of a subtle change in their feelings, this balance slowly gets unhinged...?!

From Blissful Sin:

1-2) In High School they had an indecent relationship. Now eight years later, at the school where Takebayashi is a teacher, that same Ono has come to be the school nurse. Smelling like an old man, sweet pick-up lines, totally aloof and bantering Ono. Takebayashi sighs. He gets angry, fights, and is surprised later... to find himself in Ono’s arms?

3) Ryouhei accidentally meets on the street with Naoyuki, his former neighbor friend who been nearly abandoned by its mother. It been some years since they seen each other, but how they will feel now?

4) Continuation Ryouhei x Naoyuki story

5) As it is: Tsuji is crying again because a broken heart when suddenly Aizawa, his best friend, kisses him. (Prequel to doujin Sono Mama de)

6) Has a short story Peach Sweet Home.

Izumi Seita, a gay, introverted, and pessimistic high school student, falls in love with Shinoya Toichi, his best friend. Shinoya is the complete opposite of Izumi. Before Izumi leaves for university, he gets his only chance to hold Shinoya. The sex they had seemed like a dream, but Izumi absolutely refuses to ruin his friend’s life and decides to try and forget about his feelings, even though it makes him miserable. But Shinoya won’t accept his decision…

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.

Half a century ago, the human race was attacked by an enemy from the sea known as the AUS. When Reiji Shiroyama was little, he was unable to protect his sister from the AUS because the gun he tried firing jammed. Since then, Reiji refuses to trust guns and only trusts his fists.

From Memory For You: Kunimi and Hideaki are childhood friends. But lately, Hideaki is behaving coldly towards Kunimi. Why?

From AOC Translations: A fast-paced heart pounding, and dangerous sonic love story!

Hina is busy managing the Apricot House in place of her father, but Anzu, the strange boy who lives in room 304 is quite the troublemaker.
One day, Hina accidentally breaks Anzu's keyboard and instead of asking Hina to pay for the damages, he asks her for favour after favour after favour! While this goes on, Hina discovers that Anzu is actually the charismatic vocalist for a super popular band!!! Is the lame weirdo that Hina knows the real Anzu? Or is the cool guy on stage? Hina's everyday life is changing rapidly.

From Paper Dolls Project:

Instead of her father, Hina is the one running the duties of the Building Manager in "Apricot House". One day, she accidentally destroys the keyboard of Apricot House room 304 strange resident. Hina is then asked by this strange guy to run errands for him as reimbursement. In truth, the strange guy residing in 304 is the charismatic vocals of the popular band ...... What will be his true face!? Chicks usually will change rapidly in the face of a cool stage -! Slowly, the world that Hina knows is changing. Experience this speed ​​of sound love story!

Published in 1980 in Shounen/Shoujo Sf Kyousaku Daizenshuu

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

Masaki Masamichi has his heart set on joining the legendary manga club of Takidani High School. After all of his effort to get into Takidani High School and prepare for his club entrance, he finds out that a horrible change has happened to the club of which he dreamed. How will he cope with the disappointment of learning that his long-awaited club life consists of drawing ero-manga?

Junko Sakuraba, a 27-year-old lecturer at an English conversation school has no boyfriend. Her parents set up a marriage interview for her with a man who turns out to be a Buddhist monk. However, Junko has no intention of becoming a temple wife, so she refuses to do the interview. Soon afterward, the man signs up to become her private student.

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.

From Midnight Scans:

Yui chased her boyfriend to a town and was rejected by him, and she became penniless. But the guy who saved her after being worn out is…?

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...

Madoka is surprised to discover that her parents have won a 100,000,000 yen (one million dollar) lottery. To make things worse, they inform her of their decision to pursue their lifelong dream of becoming doctors. What will happen to Madoka who, when deciding to stay behind, is left to fend for herself in a family acquaintance's (the Asagi's) guest house?