From Blue Flor:
A domestic comedy about couples in apartments.

A 31-year-old woman dreams of returning to her high-school days. She was the class president and the idol of the school. However, she did not have the courage to reply to the boy she loved back in high school. After a high-school reunion, she decides to commit suicide upon finding out that the boy she loved back then is with another woman now. She was saved by her classmate and given a medicine that can revert her back to how she was when she was 15..., but as a 15-year-old idol?

Welcome to the classes of horror! I will be your guide to a world that lurks under everyday life. For these lessons, you don't need text books or notebooks.

If you're prepared for the worst...

Salvors are men responsible for towing wrecked ships and handling the cargo. They are different from rescue teams as they usually ask for money before offering help. Nanba Rintarou's father was the owner of such a company, but Rintarou really hated the way they operated and decided to join the Coast Guard.

However, Rintarou's father died right after Rintarou completed his training. In his will he asked Rintarou to take over his company. What's worse is he left his son a debt of 1.5 billion yen...

As the title implies, the omnibus series' theme will be various stories on the undead instead of the quirky romantic comedies that have propelled his career in the past. However, the advertising promises that the series will have comedy in addition to "moving and heartrending" stories.

The main series of The Doraemons. Telling about the advantures of The Doraemons.

From Chinatown KM:

Based on the 40mP million-view hit Vocaloid song Shiryoku Kensa, Miyashita Megumi, also known as "Gumi", was one of the only survivors in a plane crash thirteen years ago. Since then, she has been able to see two copies of every person and one of them always has a "C" on them. Thirteen years later, she now wears glasses, yet her left eye remains a puzzle. And then, her friend goes "missing".

Ichihara is a boy living with supernatural powers and is treated differently by everyone except by his mother. He is trying to live a normal life but instead everyone wants to fight him and calls him a monster.

From MangaHelpers:
Ichijo Kazuya thought that he was murdered, but when he came to, he was back in his high school days. He lived his entire life as a playboy and had had countless sexual encounters with women until that fateful day that he was killed. He realizes that his murderer was his old high school friend Tanaka Masaki who was jealous of Kazuya’s relationships and his built up anger eventually exploded.
Taken back 15 years into his past, it seems that he has been given a second chance at life and given a chance to make different choices. He decides that the way to prevent his eventual demise is to make sure Masaki is more successful with girls and loses his virginity before Kazuya. But fate seems to be steering Kazuya towards the path of his previous life and keeps introducing the same girls he had sexual encounters with.

From MangaHelpers:
Suddenly finding himself in the Sengoku era, regular high school student Sagara Yoshiharu is about to be killed in the battlefield. He is saved by none other than the man who later becomes the infamous Toyotomi Hideyoshi but at a cost to his life. With history completely changed because of Yoshiharu’s actions, he tries to make things right again but it seems that history is taking a different course than the one he learned in school. Oda Nobunaga is now a brilliant but young girl named Oda Nobuna. Yoshiharu starts working under her command to bring back history to its correct course and find his way back home to the present world.

"After losing a bet, Tao Nozomu's baseball team is forced to dress up as cheerleaders and cheer for their rivals, the Titans. However, after the bet is all settled and done, Nozomu finds he likes crossdressing almost as much as he likes baseball. Despite interior conflict with such desires, he tries to give it up; but one day, he discovers he's turned into a girl?!"

Mukojima Takuro is a lonely teenager who spends his time fishing at the pier and, to his incredible surprise, fishes up Muromi, a mermaid. Muromi first off doesn’t realize she's a mermaid until she meets Takuro. Not only that, she is incredibly dense and crazy and has a drinking problem to top it off. Now every time Takuro goes fishing, Muromi appears and makes life interesting for him.

Renold has just had to take in a new roommate in his dormitory: Roger Brouwer, the school Casanova and well known to be a prostitute. While Renold is initially quite put-out at the prospect of having to not only room with the guy but also leave his own dorm while Roger services his clients, the two eventually strike up a friendship and grow close. But unfortunately, as he grows closer with Roger, who notoriously dumps his clients when they start to show feelings for him beyond simple business, Renold realizes he has feelings for Roger that go beyond those of friendship.

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Michiru Heya Reprinted Collection 1 (01～05) ---> P176
Michiru Heya Reprinted Collection 2 (06～10) ---> P176
Michiru Heya 11～13 ---> P44/P44/P48

After a long and treacherous journey, our Hero finally arrives at the Overlord’s castle only to find himself being asked for help. The Hero explains how the war that the demons have brought upon the humans have killed thousands and put more in misery. The Overlord however argues that this war has made the human society band together as one and showed empirical evidence how it has increased population, increased production, boosted economy and improved society overall. Furthermore, she explains to the Hero that ending this war will result in a civil war that will produce more bloodshed than there ever was. The Hero, convinced that the only way to bring peace, relatively speaking, is to join forces with the Overlord, agrees to help with her plans!

From Megchan's Scanlations:

In a small town in Tokyo, the PTA argues about teaching sex ed in elementary school, but what nobody knows is that eleven-year-old Haruna is already pregnant. When she decides not to tell any adults, it's up to her classmates to help her through this ordeal.

From Osuwari Team:
Uni is a prodigy with a cool reserve who is accomplished in everything except for English. One day, she insults her temporary English teacher and he overhears her. He asks her to come to his office after school and, somehow, she starts receiving private tutoring from him.

A compilation of supernatural-themed short stories.

One night, senior high-school second-year Nishina Airi is abducted. When she wakes, she is trapped in an uncanny, isolated space with other students from her high school and forced to take part in the “Werewolf Game”. Thus, a death game filled with fear and terror that would pit “Werewolves” and “Villagers” against each other, force them to murder – a game with rules so absolute, defiance is punished by gruesome death – begins.

Fushimi and Toume were just a normal boy and girl going to high school until one day they stumble upon a phantasmal mountain known as "Mount Hagure" .
Before either of them knew it, Toume was possessed by a yōkai named Dakini, a goddess that grants wishes.
When Fushimi is asked what he wishes for, his response is: Give Toume back. Dakini says she can grant the wish but in return he must become her servant. The deal is struck. Fushimi has now become Dakini's servant and Toume has been returned. Darkness, however, is afoot and now Fushimi must take on a more active role as Dakini's servant. Is he up for the task?

The dedicated student council secretary is being hit on by a half-Japanese underclassman.

Iyogi is too kind for his own good to refuse helping others. Even today, he ended up looking after a new transfer student tasked by the student council president, Akira. Enzou, the said transfer student, was raised in France: foreign-like features and gestures, stylish appearance—he’s really attractive.

For the xenophobic Iyogi, however, it was the worst thing that could happen.

Not to mention that love helplessly blossomed for Enzou...?!

[From Moi-xRyu Scanlations]