From Countless Time:

2) Invader Holds Ambition ~ Love Attack
A student must fight an older rival for his sensei's love.

4) The Prince & The Beast
In a kingdom filled with half-animal people the Prince of light meets an innocent wolf-boy.

From Temptatious Taboo:

Normal high school student Riku comes back home one day to find... she is now the school chairman of a famous elite school?! It seems her grandfather left her the post after his death and, although Riku is not really enthusiastic about the idea, there happen to be two really interesting guys that attend that same school...

Also contains a side story called Kimi no Te to Hitomi to (Your Hands, Your Eyes) in volume 5.

Sakura Kaho is a first year high school student who can see ghosts. While she is extremely afraid of them, for some reason, she is loved very much by them. Her friend, Aki, on the other hand loves to see scared people - especially if it is Sakura. Follow their tale in this morbid-cute four koma manga!

The seven teenagers who committed crimes had their body parts related to the crime they committed taken away and was sent to a school with a locked room. To return to their normal lives, they have to continuously take the examination and graduate as the first in class within one week, or else...

From AOC Translations!:

The Asahina brothers chase around our heroine, causing a bit Purupuru ruckus! Experience BroCon in a fresh-new style!

The 4-komas retell the events in the light novel in a hilarious twist.

From Dangerous Pleasure:

The Master Sergeant, who is stationed at a garrison deep in the mountains, is being troubled by the fact that his comrades are all being distracted by the arrival of the beautiful new Catholic chaplain. When he makes a request to the Lieutenant Commander to replace the chaplain, the Lieutenant Commander tells him that he will grant the request if the team he leads wins a battle drill. However, the chaplain must also participate in the drill...

The story follows Baku Ryosuke, also known as "Bakudan" a fresh-out-of-juvy punk and a dangerous street-fighter who is scouted by a yakuza syndicate and dreams of becoming the greatest yakuza in Japan. However, to teach Bakudan a lesson, the yakuza send him to the gym of a retired heavyweight boxer named Ken Tamaki to get him to sign away his property. But after fighting Bakudan for the property, Tamaki becomes impressed by Bakudan’s fighting skills, and from then on devotes himself to helping Bakudan follow his true destiny… to become the first heavyweight world champion boxer from Japan!

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