When an aloof but kindly teenage boy named Tatsumi helps out someone who'd collapsed on the banks of a river close to his home, little does he realise that he'll soon be sharing the bathroom of his modest town house with Wakasa, a self-obsessed and playful merman. Impromptu visits from Wakasa's friends - all of whom are aquatic animals with human traits - while fun, don't exactly make things easier.

Welcome to Tatsumi's bathtub. It's getting a bit crowded.

One day when I got home as usual, what I saw was my classmate Sara in a maid costume. It seems like she's working at my house as a live-in maid...?!

A side story (?) of the original Orenchi no Maid-san with the same characters, made by the same author as a hobby.

From MiiRache:
Our always bright and cheerful heroine, Nat-chan, finds herself faced with a serious problem! She’s crushing on a guy who already has a girlfriend! Oh, what’s a girl supposed to do? Well, join the Sports Day Committee in order to be close to him of course. But things don’t turn out the way she expects as she runs into a few problems, one of them namely Sakaguchi Touya. He doesn’t just bother her by confessing his love for her everyday, even worse, he steals her dessert every lunch hour!
Includes another short story called Sunflower Carnival.

From Nakama:

One day, a couple who have been dating for a good while, decide to spice it up with role-play. In order to break down their old patterns using role-playing, cosplaying apparel has been procured – and what a cute policeman short shorts and maid skirt costume set it is! Can the perverted policeman and the rugged, manly maid reaffirm and recapture love through beating hearts and coyness!?

From Chibi Manga:

The everyday misfortunes that occur are from her prayers to God. She believed that her parents and the sister that she loved so much died because of her unhappy predisposition. She can’t even make friends, but all she does is just continue to pray everyday…
And then one day, she met Koini who is invincible at fighting and Kinzou who is invincible against love and was told “we will protect you”!?
This is a high tension love comedy.

From Fantasyshrine:

My senpai is super-hot, super-popular, and a super-model. Rumor has it that he always invites his target to the library and ravishes that person right there and then…
Which is why I was totally shocked when he suddenly asked me to join him at the library!?— I’m ecstatic!!!
My body is already burning in anticipation—!

Ch. 1 - Our Plan of Copulation
Ch. 2 - Underwear Thief
Ch. 3 - Apartment's Peephole
Ch. 4 - Strip Tease in the Bath
Ch. 5 - Even Though I'm Older...
Ch. 6 - Even if It's Painful
Ch. 7 - When The Cherry Blossoms Bloom
Ch. 8 - Extra for ch3, title: Hole

Ryo is helping out at his father's modeling agency. But, his classmate and rising rookie model at the agency, Ito, is openly antagonistic to Ryo's older brother, a very charismatic model. Ito finally corners Ryo and demands that he looks at him only! After a passionate kiss, he promises that crossing him will incur punishment! Ito may be an arrogant boy who does nothing but give orders, but Ryo is undone by his forceful and dominating approach!

From Attractive Fascinante:

Shijima Rui, a potter, and Ubukata Toriko, a cram school teacher, finally got to live together. Just like any newly-wed couple, because of their different backgrounds and lifestyles, they had to learn how to accommodate each other. Learning how to take care of a baby and getting their families' recognition were also the challenges they needed to face. But how would Shijima going to prove his love for Toriko when they met with a new love rival?

From Intercross:

Kurosaki Mafuyu was a juvenile delinquent and head of her gang before her subsequent arrest got her expelled from high school. Now that she’s transferred to a new high school, she’s determined to become an “ultra-shiny, super feminine high-school student.” But with a new friend like Hayasaka-kun and a homeroom teacher like Saeki Takaomi (who may be more than he seems), will Mafuyu really be able to live a girly-girl high-school life!?

From Attractive Fascinante: 1-2) The Mermaid of A Back Alley The club manager, Kagami, saved a pretty guy, Ran, in a middle of a rainy night. Kagami couldn’t stop himself from devouring the beautiful Ran after taking him back. Ran accepted Kagami and also learned whatever Kagami taught him. But where does Ran come from and how is he related to Kagami? Several oneshots follow. 3) Execute In The Night 4) Assistant Professor Ogura's Love Lecture 5) Night Joker 6) Small Resistance To A White Robe 7) Small Resistance To A White Robe ~ Preview

A prince goes to Japan to escape the palace life and to be treated differently. He wants to be a normal student, but when he catches the student council president's eyes, what will happen to him?

From Attractive Fascinante: Takatsuki thought that Suou sensei was the only one who was compatible with a top student like him. Takatsuki refused to accept Suou’s rejection and insisted staying over at his house to be his slave. However, Suou asked him to leave because Takatsuki couldn’t strike a balance between schoolwork and doing his slavery duties. What should he do to get Suou to look at him?

1-4.
Asagami was kidnapped and found himself on board a yacht when he woke up. The one who appeared in front of him was his kouhai, once a beautiful and gentle angel, Fubuki. “Senpai never came to look for me after graduation. So I want to make you mine even if I have to do it by force.” After saying that, Fubuki did everything he could. He’s so obsessed with Asagami and even put aphrodisiacs into his food. Will Asagami give in?

5. How to Raise a Boy (Side concerning the secretary who appears in chapter three)
Super elite secretary Sagaya has a clumsy side to him, and when he accidentally bumps into Haruna he feels guilty that the boy is fired. Taking the boy in is the least he can do, but his feelings for his adorable houseguest are getting more complicated by the second...

6. I Am Loved
When his teacher/lover breaks up with him and gets transferred to another school, Takase doesn't give up, and secretly transfers too. Handsome student Tanoue is interested in Takase, but will he be able to capture Takase's heart away from sensei?

Perhaps, there’s a chance that we can say good-bye to our virginity”

With that dishonesty reason, three high school students - Tomo, Niina and Megu - determined to become “idols”.

But how will these boys beat the current idols!?

Majima Kita is a all-boys high school — shorten as “Maji Kou” is known as “Lenient, Lewd and Beautiful”. Presenting by the life-sized boys high school students boys, the success story of the new generation of nowadays’ youth!!

From JShoujo Scans

Mikoto Inui lives with her rich grandfather. Her parents are dead, so he's all that she has. Her grandfather is worried about what will happen to her when he's not there anymore, so he wants her to attend an omiai [an arranged marriage meeting], while she'd prefer to go live on her own. He pushes her to attend them anyway, but at her next omia, she meets Saruno Itaru, whom she likes right away. They decide to get engaged but... things aren't what they seem to be?

A soccer loving boy Takasugi Kazuya dreams of playing soccer with his Japan League star father at the National Yoyogi Stadium. The story follows Kazuya's life as he travels to Argentina, plays for Yamaki, and goes to the 1998 World Cup in France.

The fate of the world rests on one man's shoulders. Or, to put it more exactly, it rests on his balls.
In a freak sealing accident the Queen of Terror is sealed into Satou Kohta's balls, thus preventing her from reigning destruction on the world. However, a lesser devil, the incompetent horned tsundere loli Elyse, has been sent up to Earth to release the Queen at all costs. The only way to do so is to make Kohta ejaculate, and Elyse only has 30 days to do it.
The battle for mankind has begun, in Kohta's pants.

From TJO:

The Kingdom of Granza is steadily building up their power and expanding their realm. Fleeing from their attack on her home, Faana and her companions hide in the woods, hoping to escape from the Granza military. However, as her group is hunted down, Faana is the only one fortunate enough to escape alive.

Half-dead, Faana somehow manages to travel several kilometers to the Kingdom of Cordeaa, where she passes out at a lake. Upon awakening 3 days later, she is surprised to find herself inside the castle of King Yogufu, the ruler of Cordeaa. Faana is even more surprised when she meets his daughter, Princess Orfina—the two girls are identical strangers.

The two become fast friends, but this happiness is soon overshadowed as Granza advances its campaign into Cordeaa...

Where did she come from? Just who is she? The female hive Toda mowed down a swarm of powerful cyborgs.