From Impossibility:

Yoshida Miake is a charismatic first year high school student who is in love with her best friend whom she has known all of her life. The only problem is the fact that he has no interest in her whatsoever. Heartbroken, she finds comfort from "Mr. Black" and slowly begins to develop feelings for him. But how can she develop a relationship with a person who exchanges kisses for lunch?

A romantic comedy about an innocent high school girl named Yatsugi Chihaya who tries to express her love for her math teacher at a school called Yasaka-sensei by taking a reference from the Manga Porno about the Forbidden Relationship between Teacher and Student given by her close friend Chihaya. Will the Chihaya's feelings be conveyed to the teacher? Just check out the romantic comedy manga that is full of the cuteness and silliness of the teacher and students below!

From ANN:

"The manga revolves around a polar bear who falls in love with an earless seal, and he wants nothing else except to protect him, even though the seal constantly thinks the bear will eat him."

Shizuku has a unrequited love for Ichinomiya-sensei. But since Ichinomiya-sensei is her sister’s boyfriend, it’s a love that definitely won’t come true... She's trying hard to quickly find a new love, and she's been rushing to search for her soul mate within 10 years! When she went out searching for that fated person, she had a horrible meeting with Hatori from the tennis club.

A sequel/spinoff of the Alice in the Country of Hearts manga. It’s happy ever after for Julius and Alice who are now lovers. But married life with the morose, antisocial workaholic Clockmaker is not without its problems. Now a “crazy storm” that is said to change everyone it touches is about to arrive. What further adventures are in store for Alice Liddell in this strange Wonderland?

Yuri, a college student, is saved by Ouya Toshiomi, the young leader of the Ouya group when she’s being forced into consuming illegal drugs at a party. Since then, even though she doesn’t want to get involved with the internal dealings of the Yakuza, she can’t help but fall for Toshiomi’s surprisingly gentle smile. This is the story of two people who are attracted to each other, but the courtship of a man who lives staking his life may be too fierce and crazy… “Yuri, it might be our last night, so let's get crazy together.”
The most dangerous love ever, begins.

On the commute to the prestigious institute, St. Gloria, Morisaki Hinatsu confronts a demon. He fights and struggles despite having a cursed bloodline. At St. Gloria, every student must participate in the school’s custom where one must use any tactics to obtain ID tags from one another. While struggling for ID tags, Hinatsu notice a demon watching him… What could this person want?

From Aerandria Scans:

Endou Kana is a cheerful school girl who has a secret crush on... the mayor, Minato Kouichi, a perfect gentleman and well-liked leader of the post-war town. With the help of her friend Akira, she investigates him, until the trail leads her to an abandoned-looking house where a strange and scary foreigner lives. He and Kouichi seem to have some kind of relationship, but what is it? Kana's and Akira's take on that question are completely different and there's still a chance both of them are wrong!

From Baka-Updates: In Asahi's school, there's two tipes of students: the ones from the elite class and the average one. After an accident in her house, she starts living in the rooms of the elite class but no one must know, or else she would be expelled. A black hair guy from the elite discovers her secret, what's going to happen to her?

From Girls' Generation Scanlations:

Bad drunk, four-eyed tsundere, Takahashi Kyouya, returns to his hometown after four years of absence to find his childhood friend, Hino Motoharu, waiting for him. Oblivious to Kyouya's feelings towards him, Motoharu is more than happy to have Kyouya back. However, love that sparkles in the boiling hot night in the midst of the Karatsu Kunchi festival doesn't seem to stop flowing.

Right after he was dumped, Tarou got a call from his newly-wed older sister, asking him to babysit her husband's teenage son. Tarou arrived to find a disrespectful 17-year-old kid who seemed to hate his guts. How would Tarou cope with the situation?

From Nakama:

1-3) Shijo Kei has no interest in men younger than 40! Because of this fetish, he had gotten into numerous indecent relationship and heartbreaks. His kohai, Hiro, can always be counted on to comfort Kei as his "cushion'. Until one day, facing yet another Kei’s self-inflicted anguish, Hiro finally snapped and declared, "Try me!" before he crushed a totally stunned Kei into the bed with his pent-up passion!! Can Kei’s broken heart be mended by the sweet pain of a younger man’s vigorous embrace…

Chapters 1-3+extra: Koi to Kedama to Otonari-san
Ichinose, who is not very good at socializing, meets his next door neighbor, Tsuchiya, and his pet cat. After becoming good friends, Ichinose is extremely grateful to Tsuchiya. However, Tsuchiya, full of feelings for the other, desperately tries to hide his desire...!?

A collection of oneshots.

From Chibi Manga:

A heroine who can see a spirit, Sakura! From living with fear being threaten everyday turns into a ikemen paradise student council...? What Is happening..?

Rinne, a huge fan of Buddhism, was searching for a "monk-type," a boy as calm, intelligent and diligent as Lord Buddha himself, when she set her sights on a young, handsome monk-in-training, Yuuryou. She soon learns that this kid, out of his robes, is not her dream boy, but a shallow, irresponsible lady killer who goes by Yura. Is Rinne going to give up on her fantasy, or is there more to Yura than meets the eye?

Sakura is reunited with Kenshou, a man who is 9 years younger than her, who she has thoroughly rejected in the past. Now that Kenshou has grown up, can Sakura set aside her reservations about dating a younger man?

Koi to Senkyo to Chocolate follows the protagonist Yuuki Oojima, who attends Private Takafuji Academy, a large school with over 6,000 students. Yuuki is a member of the food research club, along with seven others, including his childhood friend Chisato Sumiyoshi. The members leisurely spend their time in the club not doing much activities. When the election of the next student council president comes up, the front runner Satsuki Shinonome proposes that clubs that have no merit should be sorted out and abolished. The food research club seeks advice from the current student council president Yakumo Mori, who suggests Yuuki run in the election as an opposing candidate. Yuuki learns about the issues facing the school and decides to run in the election.

Adaptation of Satsuki's route.

Lies are forbidden and love is doubly forbidden.
In the near future, when young people in Japan turn sixteen, they are assigned a marriage partner by the government. People don't have to go through the trouble of looking for someone, and everyone accepts that the country will find a compatible partner to make them happy.
Yukari Nejima is fifteen years old. He lives in a small corner of the country, and just can't seem to get ahead in life. Both academically and athletically he's below average. But in within him, he hides a heart burning with passion! In this world in which love is forbidden, what will happen to him when he falls in love?

Kamio Shuuji, the heir to a rich organization, has just transferred to Hazuki's average public high school. When Kamio catches Hazuki's eye with an intense gaze Hazuki begins to wonder over his attentions. Especially when Akira, his lover, warns him to stay away from him. He intends to do just that, that is until Kamio claims to have fallen in love at first sight with Hazuki, giving him a kiss to seal the deal. But what exactly are Kamio's intentions? And why has Akira warned him against the heir in the first place?

Hana who loves to sleep and has a hobby of sleep research and Takashi Kiichi 's room share life. There are lots of sleeping laws that can be used right away in such two lives...... Let's sleep together with the sleeping way. The two of us living together begins!