The manga adaptation of the otome game. The story centers around the six sadistic Sakamaki vampire brothers and a girl, Komori Yui, who goes to live with them.

Yui Komori is a positive-thinking girl who nevertheless is troubled by seeing spirits and experiencing poltergeist phenomena. In her second year in high school, she transfers to a new school — a night school for entertainers and celebrities — due to her father's work. There are rumors that there are vampires among the student body, and Yui ends up living with the Sakamaki brothers.

Yuuki-kun was one of the star players on his junior high-school soccer team; along with his childhood friend Shinichi. Due to a promise that he made with his female childhood friend Miyuki, Yuuki kun has decided to take the long road to the J League by joining a normal school club and winning tournaments, instead of taking recommendations like Shinichi did....

When he checks the club of his selected school, the best club in the country; he quickly notices that the club is completely devoid of any members except for a weird girl that goes by the name of the Fujisaki Rin. She along with her friend Ayane seem to have driven everyone out of the team....

But is it really that Rin and Ayane want to dissolve the soccer club? or could they possible want something else??.... And just what is exactly the promise that Yuuki did with his childhood friends? Well, regardless of the answers it seems that Yuuki isn't in for a smooth sailing, as he completely seems to have fallen into Fujisaki's hands...

From Manga Art:

The Cosmos is ruled by a holy queen who guides and watches over the movement of the stars. By balancing elemental forces with the help of nine Guardians, she keeps the planets stable and the people content...However, the power of the queen is fading and a new queen must be appointed.

Two girls are selected to be the queen candidates: Rosalia de Catargena who comes from a noble family in one of the main domains and the main character, Angelique Limoges, a seemingly ordinary girl.

Will Angelique become the holy queen? Or will she fall in love with one of the many handsome Guardians and forfeit her candidacy?

From Shiroyukineko Translations:
The Soaring Dragon Continent is a world of summons, you can only become strong if you become a summoner! Yue Yang, an average high school boy, was suddenly sucked into a wormhole and brought to the Soaring Dragon Continent. When he woke up, he was greeted with a lot of worried faces and found out that he had assumed another person's identity. Turns out he's the good-for-nothing son of the Yue Family, who had just recently drowned himself because of a failed engagement. Mysteriously, Yue Yang succeeded in summoning a monster on his first try, even when his previous self couldn't summon a single thing for eighteen years. Monsters simply listened to his orders and agreed to form contracts with him.
Thus begin the journey of the summoning prodigy.

From Lezhin:
A study group is where students gather together with the same goal in mind and help each other succeed. But not every study group is the same. And nooobody said there had to be a single goal in mind. Sunggi enters a study group that is supposedly focused on studying for the government service exam. But that doesn't mean that's all they have to do, right?

Warning: Contains NTR content!

The St. Mikhailov Academy student Oribe Mafuyu comes across a mysterious silver haired boy named Sasha. He is a Qwaser, a being that draws power from Soma and is able to manipulate a specific element. And now, in the 21st century, the mystery revolving around an Icon turns the academy into the battlegrounds for the fight between the Qwaser!

From Paperdolls Project:

Manga based off the popular otome game of the same name, tells the story of 17 years old Katagiri Kaede that is determined to be a ninja studying in the famous Fujiwara Ninja Training Academy. One Day, Kaede accidentally cast a genjutsu (illusion jutsu) called Mero-mero Jutsu which causes any guy within a range to falls head over heels in love with her! Now, she has to pick one of the guys she charmed to train together so she can pass her ninja exam. Trouble is, the guys she charmed are all popular guys in the academy! What will happened to our heroine from now on...?

From MangaHelpers:
In the year 2020, it was found out that a harmful virus had infected the human race, killing them slowly and bringing them towards a dark future. But with the technology they had in hand, in an attempt to save the civilized race, the people chose to go through with "Beast Transformation." Knowing that other than humans, all animals were safe from the virus, the humans made the decision to inject the genes of animals into themselves to become part-human, part-animal. In the end, the idea was "Either you do beast-transformation or die." With the race known as Homo Sapiens gone, by the year 2035, being a beast-human was normal.

In this new world, one strange boy, Kokuryuu Kazuto, 14 years old, is the worst runner and least athletic, but somehow also the most popular, with girls giving him hugs and boxed lunches, to his chagrin. But one day, he's approached by three girls, members of a group called the "Pure-bred Special Ward," who claim that Kazuto is actually a human, who should not even exist. Although he's in disbelief, he has to accept it as fact when he finds out his "ears" and "tail" are all fake. How will Kazuto face this dilemma, when he's a human in this beast-human driven world?

Fifteen years ago, natality decreased greatly in Japan and the few who were born during that time are called the "Old Generation" or "Oldgens."
Hanasaka Haru, a 15-year-old Oldgen, has never met any classmates before. Now, he goes to school for the first time and meets Himeshiro Sakurako. But Sakurako is not quite the ideal classmate he imagined, and his dream school life isn't turning out the way he wanted it to...

I love math. Just after the high-school entrance ceremony, I meet a beautiful girl: Milka. Milka is a mathematical genius. She shows me many math and many elegant solutions. Milka and I spend a long time discussing math in the school library.

One year later, I meet another mathematical girl: Tetra. Tetra is one year younger than me, and asks me to teach her math. While I teach her, she begins to understand math and gradually to love its elegance.

The third series is about logic puzzles, Peano arithmetic, epsilon-delta, Cantor's diagonal argument, Hilbert's program and Gödel's Incompleteness Theorems.

From MangaHelpers:
Yasaka Tokiwa lives in an unusual time, and according to his dreams, it's about to become even stranger. He's been having a dream of a woman called Ri'in ever since the robot, who he calls Makina, came to his home. He and Makina attend the same school, where their other classmates include a secret ninja (Kusanagi Kanata) and a sorcerer (Yata Haruka).
When Tokiwa, the robot, the ninja, and the sorcerer rush to rescue the student council president from a demon, the boys find that they've all been having the same dream! What is going to happen to their world?

Jang-Mi and Taebong's long-time friendship is put to the test after they both sleep together for one night. Is this love or just sex? Read H-mate ( Hメイト, H메이트) by Turtle Feet now!!

Maybe you'll like: 
+ Brawling Go Manga
+ Skill of Lure
+ Sweet Guy
+ H Campus
+ Yahalue
+ A World That I Rule

From Kodansha:

Class troublemaker Ryu Yamada is already having a bad day when he stumbles down a staircase along with star student Urara Shiraishi. When he wakes up, he realizes they have switched bodies—and that Ryu has the power to trade places with anyone just by kissing them! After figuring out the workings behind this new and amazing ability, Ryu and Urara take full advantage of the situation to improve their lives. But with such an oddly amazing power, just how long will Ryu and Urara be able to keep their secret under wraps?

Once upon a time there was a loser, but that one day he got the ability. Ask what? Well ... it's hard to explain, he knows how to instruct on "the right path" girls who strayed from it.

From Easy Going Scans

What happens when you take a good, long look and realize that your boyfriend is prettier that you? And what happens when you go to a high school with so few girls that you're considered a goddess? But then again, your pretty boyfriend is also attending the same school...

Minato is a total loser. He's failed to make it into college twice, he's unpopular with women, and he's unemployed. He seems like the classic-useless-shounen-harem-male-lead...
In truth, however he's actually an Ashikabi--one of a mysterious set of "masters" in an awesome battle royale between hordes of cute girls called "Sekirei."
Since this is an ecchi manga, with their attacks they often happen to... you guessed it--ripping each others' clothes off! Looks like his luck's taken a turn for the better.

Nanami Rei has always lived his life in his brother's shadow. He can't talk to girls, he's not athletic, and his grades aren't good. On the contrary, his brother Ren is smart and popular, but he has never judged Rei for his faults or lifestyle. One day, Ren goes into shock and mentions to Rei the name, "Wonder Rabbit Girl". Rei, seeking to find this mysterious figure, attends Ren's school, disguised as Ren himself.
Rei comes into possession of his brother's USB drive, which contains a list of the school's girls and their fetishes. Rei believes that one of these girls must be the Wonder Rabbit Girl.

When humanity was threatened 5 years ago, the boy who saved the world was driven to despair and became regarded as the enemy of all of mankind. And now a new crisis approaches humanity. The curtain rises on a gallant drama about a hero falsely charged.

Ishikawa Takuya, a high-school student who doesn't stand out in any particular way, is surprised when his principal asks him to take care of some transfer students. He is even more surprised to find that there are actually 30 charming female transfer students in his care, who have come from a boarding school that was destroyed in a fire! At first it seems like a dream come true, but then he notices their knives... and guns... What kind of school did these girls come from?

Wild's High has a 42-year history as a fighting specialized, girls only, private high school meant solely for the elite. It is also the place that Wild's-League is held: the most popular event in the country and the only place in the world where teenage girls have brutal fights with their lives on the line.

One year the school changed from a girls only school to a mixed gender school. The only male student, Song Jae Gu, has been granted a full 3-year scholarship regardless of grades. Being someone who had to spend every moment either working or taking care of his younger brother and sister, he accepted.

But after meeting Queen, the bloody champion of Wild's-League, drenching her in coffee, calling her a monster, and getting caught seeing her while she was taking a shower... his scholarship could prove fatal.