In the story, the main character is on the way back home from being rejected by a girl when he finds and picks up a high school girl who has been abandoned on the roadside.

From Canis Major Scanlations:

Mizushima, a florist shop staff, wanders into a big mansion’s garden because he’s attracted to the flowers there. Fujisawa, who lives alone in that mansion, suddenly came to request for a flower arrangement from him. Upon arriving at Fujisawa’s mansion again, Mizushima is caressed by him…

Is he only playing around with Mizushima? What are his true intentions?

From Daum.net: Han Ga-Ram will even outwit the swindler gangs. Everything is solved when she transforms back into her unpopular highschool girl moments... Who would suspect a geek with glasses? There is only MONEY on her mind.. day and night. On the other hand, her other twin Yu Ga-Ram exists unknown to both of them. Unlike her, her sister has to bear the bullying acts of her step sister. The story unfolds when the twins try to escape their fate...

From MangaHelpers:
At school, Kamazaki Yuu feels as though there is a circle drawn around her, a line that no one will cross. A part of it is because her face looks mean, and another part of it is because she's rather socially awkward, but the largest part of it all is that she has earned a reputation for being really bad-tempered and violent to the people around her.
This all changes in her second year of high school.
The cute, friendly, and popular Kume Asami one day inexplicably crosses that invisible line and decides to be her friend. Kume introduces "Kama-chan" to friendship and to the 5-man futsal club that meets on the school roof. As Kama cautiously enters Kume's club, she may find herself able to grow past the bad expectations people have of her, and enter into a new, happier, high-school life.

A man moves to Tokyo and writes a letter to his parents describing his experience.

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 -

Hikaru Onuki is a 22 year old girl whose hobby is to cook homemade cuisine in order to find a boyfriend. But for some reason, no matter how hard she tries, she is unable to find one.

Itou-san is bored with her job. One day, she receives a letter.

N/A

On an alternate Earth in the not too distant future, a monster is found by 2 kids, and shortly after a 3rd friend joins the group. It's a story about the monsters journey through life as he tries to find out who and what he is...and about his true destiny. https://www.facebook.com/grumblemanga?ref=hl

Moriya Shigeru’s hobby is reading BL and cross-dressing. He's a twisted guy who loves to harass others. However, there’s one guy he’s been feeling bothered about, and that’s Sahara Masatoshi, an idiot who clings to his one-sided love for his childhood friend. Shigeru, who can’t help but feel excited about the prospect of teasing Masatoshi, gives Masatoshi a blowjob to harass him, but Masatoshi looks at him as if he despises him…? “I won’t get hurt over something like that… It’s not like I’m really in love with him or anything.” The bitter one-sided love of a tsundere with an unpleasant personality.

Spin off of Kare no Tokubetsu na Kare which involves Sahara and Moriya. The difference between “love” and “hate” is always a difficult question for teenagers...

The Main character gets trapped in a world where it's ruled by laws and orders. Will he escape?!

From Easy Going Scans:
A story from Kousei and Tsubaki's childhood.

Note: This work is a special volume released with the DVD of Shigatsu wa Kimi no Uso.

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.

High-schooler Shiina Shinya thinks that all girls are pretty much good-for-nothing, mostly because he doesn't understand them at all. That doesn't stop him from being surrounded by strange girls.
Tsubasa Tooka, a cute, much-admired girl, stalks him. Shikimura Masami is majorly into masochism, and has recruited Shinya into her play sessions. Ikari Satsuki seems suspiciously interested in the recent serial stabbings, and seems to want to drag Shinya into it. Banjou Yoruko, a normally quiet, bookish girl, has decided she and Shinya are bound up in some fantasy setting. Uchida Yumeji is the school's sleeping beauty, who spends all of her time in the infirmary because she requires so much sleep. Shinya brings her newspapers, so she can keep up with current events in the short time she spends awake. Lastly, Okui Akane is convinced she is a vampire. For all Shinya knows, it could be true, but in practice it just means that he has to let her drink his blood.
How will Shinya deal with all these good-for-nothing girls that complicate his life?

Mihama Academy - on the surface, a closed learning environment established to nurture students who find themselves at odds with the world around them; in actuality, an orchard-cum-prison built to preserve fruit that has fallen too far from its tree.

Whatever the circumstances behind its establishment, Mihama Academy is at present home to five female students, all with their own reasons for "enrollment." For better or worse, each girl has established a routine obliging of her current situation; life moves at an idle, yet accommodating pace within the walls of Mihama.

Yet with the arrival of the institute's first male student, the nearly preposterously opaque Kazami Yuuji, the students at Mihama begin to fall out of step with their predetermined rhythms. Will Yuuji prove to be the element the girls around him needed to take hold of their lives once more, or will the weight of their pasts prove too steep a wall to overcome?

Based on the visual novel of the same name by Front Wing. This spin-off focuses heavily on Yumiko Sakaki's story.

1-3) Hana to Usagi
Our delivery service's regular customer, Aizawa-san in room 411, is always wearing a rabbit head… Why is he wearing something like that in the first place? Pervert? Everyday he sends or receives delivery but you can’t see his face, and he’s almost mute, there’s nothing scarier than this. But one day, still wearing the rabbit head, he grabbed tightly onto my arm, “T-thank you, I’ll see you again tomorrow…” Saying it in such an embarrassed way- My heart beats so fast.

Extra - Actually I thought of a good way

4) That Smile Once Again
Fujimura is a talented pianist who refuses to perform in the school's culture festival despite the student council president, Segawa, trying to convince him daily. Why won't Fujimura perform? And why does Segawa keep on pestering him?

5) Greatest Common Denominator
Tatchan and Shouhei are in a relationship. Shouhei wants to ramp it up to the next level, but Tatchan seems hesitant. Is this love just one-sided?

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.

Tokano Yuuka has been going out with her boyfriend Yazaki Norikazu for a little over a year now but doesn’t get to see him everyday since he works in a different city as a newspaper reporter. Although they are apart, they love each other and things are going well. Norikazu gets an opportunity to interview Saeki Keito, the lead singer of the most popular band in Japan, Zero Sum Game, because they were good friends in high school. Being a fan of the band, Yuuka gets to tag along. However, Yuuka gets raped by members of the band while Keito distracts Norikazu elsewhere. It seems that Keito is infatuated with Norikazu and wants Yuuka out of the way. After the traumatic event, the relationship between the three becomes extremely complicated.