Oshaberi na Jikanwari is based on Mizusawa Megumi-sensei's own love story. It is the story of how she had a crush on a boy since primary school and the events that took place while she goes from primary school through junior high to senior high.
(From Esthétique)

Includes a side story about one of the main character's friend, Satsuki Goto, and several oneshots by the author:

The Message
Akari has been keeping a secret from her friend and crush, Wataru. In the spring of 10th grade, she found a tape of Wataru confessing his love to Yayoi, and even after knowing Yayoi had feelings for Wataru, she still hid the tape! Now, two years later, the Akari and Wataru pleasantly bump into Yayoi again...

Landscape of the Second Year
Soko, a second year college art student, is still secretly struggling with her past breakup, but with the help of Kando, overcomes it.

A guy takes lessons for sex and is in love with his teacher. The crush teaches him sex "anally." Wonder how it'll end...? ;D (a must read!)

Ever feel like you just want to sit in a corner and just curl into a little ball? Or when your world seems to be too crowded, you just fight against your fate? Yuuji Tsukamoto can't do either. He’s the son of a very successful business man and is as suave as Takehito Koyasu’s voice when he talks. But one thing he wants is out of his reach: Takuya Matsui. Will his constant watching over this boy lead to both of their destructions? The obsession begins…

Collecting human souls in exchange for granting their owners' dearest wishes sounds easy enough; but when you're two clean freaks who abhor coming into contact with souls that have been tainted by endless desires, what do you do?

From Infinity Scan: As a child, Maria would tell a story about the Orgel to Sara. A story that seem to be out of this world. On that night, Maria intrusted Sara with a special gift, the Orgel. Although, Maria would like Sara to hear the tune from it but it was impossible without the key. It a gift that will lead her to unlock the Orgel one day and to find the place in the story that Maria had told her about. The academy in England where Maria resides...

A sci-fi story about a man who takes home an android he finds on the street.

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?

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: 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

From Nagareboshi Manga:

・Oresama Ouji
Sawa hates Judo. She was once really good at it, but boys always rejected her because she was so strong. Now she's entering high school and the gorgeous captain of the Judo club has selected Sawa (against her will) to be the club manager! He also claims he knows her from the past... How will Sawa deal with managing the sport she hates most, especially since the captain seems to like her?!

・Koishiteru...

・Koiseyo!! Onna no Ko

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 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

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 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 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.

1-4. I Am the Champion of Love
Top model Asagi has a tooth ache, but after meeting the single dentist, Yui, it's not just his tooth that aches. But Yui is not interested in a relationship and just wants Asagi to go away. Can Asagi convince Yui that there is more to life than work? Can dental chairs really be used that way?

5. Holding onto Love
Hiroyuki is always being compared to his older brother, Kouichi, and he always loses. Even Hiroyuki's crush, Kei sempai confesses to Kouichi. Will Hiroyuki fight for the one he loves?

6. Only You Can
When his younger cousin Touya moves in, bored Masayasu decides to have some fun with the strait-laced student. But what starts as a joke becomes much more serious.

Riku Kurata has to cross-dress due to family reasons, and when Riku's classmate Shunichi Ozaki realizes he's a guy, he decides to exploit it for his own enjoyment.

Collection of 23 stories about love in the everyday life of the Japanese.

1. His Scent
A woman reflects upon finding the scent of her lover from two years ago.

2. Heavy and Pop (♂)
A broke youngster starts selling him to an old lady.

3. Painfully from the Heart
Showing the connection between pain and love

4. Holiday
A woman spends a day at home with her depressed boyfriend.

5. Heavy and Pop (♀)
A prostitute thinks about the concept of love.

6. A Place One Likes to Return To
A young woman who meets her ex-boyfriend and has sex with him gets confused about feelings for her current lover and her ex.

7.-8. The Silent Radiance
A girl unexpectedly meets her old womanising crush.

9. Small and Lovely
An Office Lady fed-up with her surroundings looks forward to meeting her darling.

10. At the Park
Two best friends, one of them whose name is Yoko, spends time with each other as they set of fireworks at the park, but there is a meaning behind their get-together. What is the reason for it?

11-12. The Truth Behind Things
13. Almost a Weding Proposal
14. The End of a Friendship
15. My Life - First Example: Chikada
16. Kyoko
17. That Afternoon
18. My Life - Second Example: Sawa
19. My Life - Third Example: She

20. Holiday Part 2
A girl reads a shoujo manga and is left unsatisfied by the ending.

21. Sweet
A girl reflects herself cheating on her boyfriend.

22. Painful Love III
A young man is forced to choose who he loves more. his girlfriend or the girl with whom he's having an affair.

23. The First Time

This series is based around a master and his shinobi servant. The chapters are broken down into short stores or “missions” with the master and shinobi as the main characters. In all the missions the master uses his position to tease or pressure his shinobi servant into submitting to his sexual demands.

From Fantasyshrine: Up and coming interior planner, Takamori Fumito, is having an affair with Eto Shunsuke, the president of the company where he is working, despite the fact that Eto is married to an owner of a famous fashion apparel. From the very beginning, they made it quite clear that their relationship is strictly physical. However, Takamori realizes his heart is now in danger— a story about adults struggling with love and sex.