From Blissful Sin:

A sex battle between the selfish young master and the wild detective!

After a certain incident, an excellent policeman named Jin loses his job. No longer employed, he decides to become a private investigator. One day, Kujou Anri, the young master of the Kujou family, walks into his office pretending to be a client. Instead, he ends up confining Jin! What was he really after when he bound and drugged the detective?

These adult oneshots have finally been gathered into one volume! There will be plenty of man-boobs and extra drawing to spare!

From Day of the River:

A doting father finds out that his precious daughter has found herself a boyfriend. For any father, this news alone is hard enough to accept. However, when the boyfriend turns out to be a potential lying playboy, this father will stop at nothing to protect his little girl!

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A plain but considerate main character falls for a girl who happens to sit next to him in class. Using a group project as an excuse, he gets her number and they go on a date, but everything is ruined because of the unexpected rain and his credit card reaching its limit. Over the course of the story, the main character learns the hardships of love. Original Webcomic

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In the Mirai no Kioku series:

V.1 - Mirai no Kioku

V.2 - Kaze no Yukue

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From Deux Press:
Kento Kumagaya wishes for just one simple thing: to have a happy family with the ideal housewife, loving kids, and kind grandparents all living together, happily ever after. Life, however, has other plans. Enter Akira Kazuki, a smart, beautiful and unrestrained gay man who shatters Kento’s dream with a single night of wild and passionate homosexual sex. This is a romantic, sweet and funny story between two different people (in more ways than one) who unexpectedly find the same future together.

Note: also contains an unrelated oneshot called "Winter Rabbit" in the English release by Deux Press.

From Japanzai: Moe War is a comedic oneshot within which a popular girl tries to act “moe” to get out of repaying an otaku. As she soon realizes, however, she doesn’t understand moe at all.

From Anime Waves:
Rena Misaki was a normal girl in high school in the small town of Otogi. But lately she is being tormented by Kegari Chota (little hamster like imps that cause greatly increased sexual desire). They had been banished from the village long ago by a priest. But somehow they have returned and have taken an interest in Rena. And if that wasn't enough trouble, they are starting to spread. Rena has to find away to get rid of them and have a normal life, before she ends up sleeping with all the guys around her.

Yaegaki Meguru's next door neighbor is unique, to say the least. They are the Kusanagi ninja lineage, and their son, Kanata, has been her classmate and friend since their younger years. Kanata would always get into trouble or be late to class due to his ninja upbringings. Every morning, Meguru would have to pull him away from his training with his father. Most days, he's late to class anyway. In the past, they both vowed to never hide secrets from each other, yet Kanata would not reveal the "true purpose of a ninja." Meguru understood the reason behind Kanata's secrecy regarding his ninja background when a powerful force is released inside their own school. Then, Kanata will reveal his true potential as a ninja.

‘Salaryman from Hell’ is the first in a collection of Ebisu’s stories entitled “The Man Who Saw Hell.” It’s about the day in the life of a normal Japanese salaryman. For the uninitiated, salarymen are an iconic figure in modern Japan, taking the role of everyman. Ebisu uses this generic salaryman figure in most of his stories.

The story of Yukako Kamoto, an Instant Curry lover.

Mitama Kamishiro is an athletic junior high school girl with a strong sense of justice who has dreamed of becoming a crime avenger since she was little.
A mysterious shopping district, “Yaoyorozu Shopping District,” suddenly appears in front of the silly yet righteous Mitama, who “wants to save humanity from its inevitable downfall.” When Mitama goes to the shopping district that seems to be calling out to her, she is faced with. This is a Shinto-inspired comedy about a silly, righteous high school girl and some bizarre Gods. Hurry up and pray!

From Viz:
At first glance, Nina Sakura seems like a typical teenage girl. However, she's actually a transfer student from a witch school! Now enrolled in a Japanese middle school, Nina is hoping to improve her grades, make some friends, and practice love spells on her unsuspecting new classmates.

Shy Ayu Tateishi has just made a new friend at school. But this new friend, much to her surprise, is no ordinary classmate. Nina Sakura may look like a normal middle school girl, but she's got a big secret.
She's a witch.
Or, rather, she's studying to be a witch. And apparently, she's not doing her homework. Her spells are devastating in their ineffectiveness and often result in the most embarrassing situations for poor Ayu.
But things wouldn't be so bad if Nina's sorcery didn't make Ayu look silly in front of the one boy she secretly adores. All she wants is a simple love potion. What she gets, however, is a new best friend who almost flunked out of witch school!

From Viz:
All high school freshman Airi Hoshina ever wanted was to someday live in a cozy home with a loving husband, and find joy in the little things in life. As a result, she makes it her daily mission to get to school on time because school legend has it that the longer one's non-tardy streak is, the better boyfriend one will find. But just when her daily routine is working like clockwork, an occurrence of fairytale proportions threatens to disrupt her grand plan.