The hero's son and the ghost of the Demon King are the master and pupil!?

Eirth, the son of the hero who defeated the Great Demon King, is troubled.
Always expected to achieve great things, but unable to meet those expectations.
No matter the effort he puts in, and the results he obtains, it's never enough for them.
"I'm a disappointment compared to my father" or "Don't you know you're the son of the hero!!"
Living every day like this, Eirth meets his destiny in the room containing the sword of his father, the hero.

"Interesting. I will train you. I have only free time now.”

Eirth receives special personal training from the Demon King just to get back at his parents and the world.
In the coming days, his parents, the heroes of the past, his first love, the princess childhood friend,
the geniuses of the era, and the world will tremble before him.

Eiji, Naohiko and Izumi have been friends since middle school. Naohiko started going out with Izumi later on. Meanwhile, Eiji seemed to easily find his crushes one after the other, more often his seniors than not, yet maintained a laid back attitude when it came to being really serious about romance.

Now in their high school, it has been a while since Izumi has left the city and is in a long distance relationship with Naohiko. Eiji, still a single, wonders if he has been missing something in his life. Maybe it's just his poor grades but for the time being, he wants to avoid Ikezawa, his strict, serious and diligent classmate, as much as possible. Furthermore, he is aware of Taichi, a boy from a different class, who has a crush on Ikezawa.

The romantic story involving six boys and girls is about to unfold as they don't know love yet.

Cute girls playing boardgames.

Wataru has a hard time remembering his childhood. His parents divorced and since then he has done his utmost to relieve his mother of her burdens. On the first day of school his past catches up to him in the form of three childhood, female, friends whom each want to marry him. Oh, and the neighbor girl has the hots for him too.

Spin off of Murenase about a bonobo student and a cow nurse.

From MangaHelpers:

Half a year ago, the four members of a literature club, as well as the elementary school niece of their faculty adviser, were bestowed with supernatural powers. The boy in the club, Ando Jurai, became able to produce black flames. The girls acquired a variety of powerful abilities: Tomoyo could slow, speed, or stop time, Hatoko could control the five elements (earth, water, fire, wind, light), little Chifuyu could create things, and Sayumi could repair objects or heal living things. However, since they gained these powers, nothing has really changed in their everyday life. Why have they been given these powers in the first place? Will the heroic fantasy life they imagined these powers would bring ever actually arrive? [tethysdust]

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The five members of the literature club awakened with extraordinary powers half a year ago. Although the members expected to be thrown into a world of super-powered battles at their school, their normal daily routine continued. No secret organizations bent on world destruction, no super-powered wars, no brave heroes or demon kings. However, the members still look forward to the possibilities of adventure, and continued to believe that with each day, they were getting ever closer to those days of fantasy. Their days of romantic comedy and battles with extraordinary powers begin!
(Source: ANN)

Exotic. Smart. Lethal. Musashi #9 doesn't live the life of a normal teenager. Her's is full of intrigue, violence, and death.

Some people want to change the world. This sixteen year-old girl can. Deep ideological, religious, and social differences drive the world closer to destruction, and the innocent masses suffer while politicians huddle in safety.
One ultra-secret organization is committed to preserving world peace, and their top agent goes by the code name Musashi #9. This agent battles terrorists and extremists, while bringing hope to the people she saves. The world may be a dangerous place, but it's a whole lot safer with Musashi #9 in it.

A four-panel spin-off story following the adventures of the 99th Graduating Class from the main series of Shoujo☆Kageki Revue Starlight!

Serie included many short stories: - Many chapters haven't been scanlated yet.

From JShoujo Scans: Kikukawa Shiori wakes up from a motorcycle accident only to find out she's lost her memory! Try as she might, she can't remember anything about the yankee-looking boy who claims to be her boyfriend, her kind-hearted and good looking older brother, or her aloof and introverted younger sister. When she goes to school for the first time since her accident, she overhears people talking about her---and the things they say aren't flattering. From what she hears, she was a terrible person before the accident. Was she really as horrible as they're making her out to be? And will she ever get her memory back?

Kaburagi Aya, a highschool student who doesn't feel fit in with her highschool life, and Kurosaki Sei, a teacher who was oppressed by the trauma from the past, knowing each other by matching App. With ulterior motives from both side, the relationship between them has been distorted gradually...

From Del Rey:
It's a gorgeous, spacious mansion, and four handsome, fifteen-year-old friends are allowed to live in it for free! There's only one condition - that within three years the guys must transform the owner's wallflower niece into a lady befitting the palace in which they all live! How hard can it be?

Enter Sunako Nakahara, the agoraphobic, horror-movie-loving, pockmark-faced, frizzy-haired, fashion-illiterate recluse who tends to break into explosive nosebleeds whenever she sees anyone attractive. This project is going to take more than our four heroes ever expected: it needs a miracle!

College students Saeko and Miwa end up drunkenly coming out to each other on a night out, and the two of them enter into a relationship to celebrate the concept of finally actually getting to have a girlfriend... so, what could possibly go wrong?

The school idol project is set at a school between Tokyo's Akihabara, Kanda, and Jinbouchou neighborhoods. The school faces the danger of being streamlined out of existence, so nine of its female students decide to become idols to protect their school and boost attendance.

Michela is a 13-year-old student at the Clausura Academy of Magic and Sorcery, a school for magic-holders aspiring to become “Wizards”. Unfortunately, she lacks even the most basic control over her powers, with all her attempts at spell-casting inadvertently ending up in explosions.

One day, Michela sets off a particularly nasty explosion that stood to consume anything and everything around her.

Just when death seemed imminent—

A young man appears before Michela, deflecting the blast in the nick of time.

Introducing himself as Eusius, the young man tells of a foreboding tale: that he has come from the future to save her... and that she’s fated to die at the young age of 18......

Hoshino Teru, a mediocre middle school boy has a crush on Amamiya, his childhood friend. However, "Micchan" stands between them, and brings chaos upon Teru's life.

Shuuichi Hayasaka has been living a normal life until one day his roommate Masamune Yasuda wakes up as a girl. Although Hayasaka feels uncomfortable about now sharing a room with Yasuda as a girl, Yasuda is fine being a girl as long as he can sleep most of the time.

15 years ago, Kusanagi-sensei gave up her love (♀). Now, her lost love's daughter is her student?! As she wavers under the pressure of her student's relentless attacks, Kusanagi-sensei's (♀/36) era of trial begins!

Raw: http://sai-zen-sen.jp/comics/twi4/kusanagi/

"Tears" connect people who have never met before. This is the story of an honour student and a delinquent who are connected through these tears.

Succubus Aroma-chan is so shy, will not really, but she can't confess to the person she likes!
"Then, what if I just invade Yuuma-kun's dream and seduce him...?"
Tonight, an ero-dream that cannot be seen by other people begin!

The lead character, Jimmy (Katsuya Oonishi) is an art student at Bara-Gaku ('Bara Juuji Gakuin'; Rose-Cross Academy). When he was little, he almost drowned, but was saved by a tattoo artist. From that day, Jimmy vowed to become a tattoo artist (because tattoos signify 'a hero' to him).

Jimmy's a decent person by nature, but because of the people he hangs out with, he's considered a delinquent. Banko, his partner-in-crime, is a shrewed kid; he sells information on the popular girls (phone numbers, likes and dislikes, etc) in the area. Despite the delinquent exterior, Banko is actually really smart and has broad general knowledge.

As the story progresses, Jimmy and Banko meet new people and they form a gang of their own; along the way they bump heads with other gangs from other schools/districts. This manga is not the typical highschool-slice-of-life story; it's got a rougher edge! This manga depicts some high school delinquents trying to get through high school life and gang fights. Okay no, mostly just gang fights.