From Paperdolls Project:

The new public health doctor-teacher that has everyone talking about is my childhood friend. He, that is ranked "elite" in looks, body and intellect is actually a big pervert! He harasses me daily and is extremely overprotective. This has caused me to have no dating experience let alone a boyfriend and I am already in HIGH SCHOOL! But lately, why is this perverted person is causing my heart beating so fast? A funny comedy between an older assertive childhood friend and the girl that is determined to not fall for his trap!

Just a short one-shot manga that was posted by the artist on Twitter.

DMG:

Love is found in the strangest places and with the most unexpected partners. The men (and cats!) of SENTIMENTAL GARDEN LOVER burst into heart-throbbing bloom!
A scruffy stray cat wishes for big hands to hold an abused man, and a cute kitten begs for speech to comfort a broken-hearted stranger. Wander further into the garden, and you'll find close siblings upset by a love rival; a jaded delinquent flustered by a trusting bookworm; an evasive, glasses-hating man; and a president eager to find a weakness in his perfect secretary.
For both cat and human, the quest for love is here!

1. Sentimental Garden Lover
Fuji is in love with Hiro... so much, that he feels no matter how far he stretches his arms, they could never encompass Hiro. Everyday he watches Hiro's abusive lover, wanting to rescue Hiro, but there is nothing he can do because... Fuji is a cat. When Fuji miraculously acquires a human body, and Hiro finds him, the past interferes in their future.

2. At Home Holiday Lover
Shima, the other cat, quietly lets go as he watches Fuji and Hiro and begins searching for a place to call his. He literally falls into the arms of love when he passes out from hunger and lack of sleep and tumbles into a man's bag. Taki brings Shima home and feeds him milk, breaking through Shima's defenses. But Shima finds himself in a painful love again, only able to watch desperately as Taki and his ex-lover (who is also named Shima) try to let go of one another.

3. I'm Home!
When Fuji tries to make Hiro coffee but fails (he's a cat... duh.) he decides that doing the dinner shopping is an even better idea. He gets chased by a stall owner and needing a place to hide, he finds a lovely open bag sitting there. And that bag belongs to none other than Taki-san! Fuji is reunited with Shima, but neither one knows where Hiro's house is...

4. From the Heart
Shigino is a delinquent who's always getting into fights, and on top of that, he gets blamed for things he hasn't done... but everyone has already made up their minds, so what's the point of denying it? One night, bloody and being chased by cops, he stumbles into an old bookstore. The owner, Sakurai-kun, is a bubbly guy who starts talking non-stop... but Shigino finds himself coming back again and again. For once, he hopes someone won't find out what they say about him... but what happens when Sakurai does?

5. Right Palm, Left Palm
They're brothers. That's why they are so close, that's why they hold hands, that's why they kiss... but why is it that they have been told so many times "Your love is strange."? When a friend says something to him, the older brother begins to understand that maybe he can't let go anymore... and what people mean by that statement. But what if Naoto doesn't want his nii-san to let go?

6. And I Come to Like You
When Oya's junior, Kuze, confesses to him a week after Oya was dumped, things get complicated. Oya likes Kuze, but can't accept the fact that Kuze wears glasses.... because the one who dumped him also wore glasses. Oya comes up with a stupid excuse about hating glasses... but Kuze doesn't believe him?

7. I Want You to Always Smile
The President has a problem: his secretary. Natori is so neat, and organized, and on top of things! Determined to bribe him, the President tries to find dirt on Natori... but he can't - that is, until he sees Natori looking happily at cakes in a bakery. Maybe, with a little bit of cake, the President can find out why his secretary is so dedicated.

+ Extra.
Extra about Shigino and Sakurai from chapter 4.

From Tokyopop: Mitsuo Shiozu is a lonely high school student who happens to be psychic. Spirits 'use' his body and mind to communicate with the dead and to help the living. These ghostly apparitions use Mitsuo in order to put right things that were left undone in life, or to tie up ends that were left loose before they left the land of the living. In the process, Mitsuo often finds that these 'visitations' change his own life in ways he could not predict. NOTE: Read from Left to Right.

A collection of stories:

1. Hajimete no Shitsuren (My First Lost Love)

2. Hajimete no Kokuhaku

3. Hajimete no Kenka

4. Hajimete no Kuchibiru (My First Kiss)
Hinata has never had any experience with love for his 19 years of existence, and finally manages to snatch a date with the help of a classmate. With no experience with girls, Hinata asks help from his best friend, Yuuma, who seems to have had many experience with girls, who in turn teaches him how to seduce a girl, but then, something happens?

5. Hajimete no Otoko (My First Man)

6. Hajimete... ja Nai? (It doesn't seem like... his first time)

Shouta Oone was feeling that his daily school life had become dull. In the midst of his boredom, he coincidentally ends up learning the outrageous secret of his classmate, Ichigo Otohime! This is a bittersweet youth story, adorned with a secret that mustn't be leaked!

Kiryuin Hanao is the idol of her school and her childhood friend Takezou is always by her side, helping her throughout her activities. But when she suddenly becomes a giantess, she is forced to return to her old ways in order to protect her city and friends.

Enchanted Arms prequel manga that came with the Limited Edition version of the game.
It's about a student named Kana who the player meets in London City after a certain event.

From Fluffwords:
Akuta falls in love easily and will always fall for others. His childhood friend, Ao, has been crushing on him for 10 years. Always protecting Akuta, Ao will destroy any hope of Akuta’s unrequited love reciprocating his feelings as Akuta always returns to Ao’s side when he is heartbroken. The Ao who has been thinking “I have to make him realize these intense feelings and this painful desire” will eventually...?

A boy changes his appearance to get revenge on his ex for dumping him.

Iori Kandono is suffering from a new illness called Monderella Syndrome, thanks to which she would suddenly experience severe pain in her chest. To make the pain go away, she can either take the medicine or get a massage by a male person. One day she forgets her medicine at home and has such an attack in school, but fortunately her classmate, Edogawa, by pure chance runs into her, and it seems he's the only one who can make her pain go away!

Misuzu Hara is a 24-year-old high school teacher who, four years earlier, endured a traumatic experience at the hands of Hayafuji, the then-boyfriend of her best friend Minako. She has never forgotten the experience, but she has kept it secret from Minako to protect their engagement, and has rationalized it to herself as having occurred to her due to her being a woman, even if it has continued to negatively impact her emotional well-being

During my second year of high-school, a transfer student, Yamauchi, arrived in my class.
Although he appeared to be an ordinary guy, he was unexpectedly anti-social!

I wanted him to quickly get along with the rest of class, so I called out to him, but things didnt go as I wanted no matter how I tried.

“That’s how it is…” I thought.

But out of the blue, Yamauchi smiled at me and since then I couldn’t get it out of my mind.
Hey, Yamauchi… can you smile for me once more?

From an accidental run-in to confused feelings, Lovely Short Short brings you a collection of romantic short stories filled with handsome boys, blushing, and close-ups that guarantee to bring out your inner fan girl.

Lu Qi An, I want you.
(Adapted from Zhang Pei Literature Network "Tian Zi Yu Dun", Original Author "Jiu Yue Mai De Bing Gan")

Everything began with the phrase "I want to go to a hotel!".

In order to fulfill her wish, the School Resort Club was formed.

From Viz:
Kippei Katakura is a 17-year-old playboy who spends his time chasing girls, careless of their feelings. But when his 5-year-old cousin Yuzuyu comes to live with his family after her mother's sudden disappearance, Kippei is put in charge of taking care of her. As Kippei gets to know Yuzuyu and starts to understand how she feels, he also begins to realize that all girls were like Yuzuyu once.

From Exiled Rebels Scans:

Hinami Takashi is always transferring schools because of his parents’ jobs and he has gotten pretty bored of the attention. He uses the rumors about him to achieve his goal, which is to maintain his mediocre daily life and to quietly go on to the next school, until the rumors about his classmate Sakura make him take a special interest in him. It seems like Takashi isn’t as ordinary as he pretends to be…

Second high school year's Katou Maki takes lesson to second middle school year Sawase Natsuki but towards him she has perv*rted thoughts?

A sweet collection about many different love stories from high school couples to childhood friends.