Kuzumi Kentarou is a salesman and also an organ donor card owner (their organs get donated upon death). He gets mugged and almost dies but eventually regains consciousness in a hospital and sees a patient with an ailing heart, Hasegawa Kirin, who tells him that he is completely compatible with her... as a donor.

Kentarou promises to give his heart to her. However, Kentarou lives on, but he never got into college. He now works part-time in the hospital where he begs Kisaragi Ryouko, an organ transplant coordinator, "when will Kirin receive his heart?"

From: Easy Going Scans:

Fate brings two people who live in the same condo together on a typical afternoon. Ozawa (26) has just broken up with her boyfriend of five years and was in the process of trying to rebuild her life when she meets Oyamada who lives a couple floors below her. He is somewhat of a loner although he does have a few friends and his room is cluttered with all the random stuff that his impulse shopper brother sends him. Ozawa takes an interest with all the things in his room and the two start a friendship that slowly turns into something more.

One day a crowd of boys rushed to Tasuku's school, claiming that he is the "Luck Goddess' Son", also asking Tasuku to get into bed with them, bringing everyone good fortune. Tasuku's very angry about it, but if he used this power he might make his best friend Oono, the lottery lover, become his. In order to test his powers, Tasuku actually begins to lure Oono...!

From amber love pj scanlations:

It's about two best friends, Tamio and Takashi. The development of a friendship to something more as they grow up.

Living his life in rural Japan, Tamio is immediately intrigued by Takashi, the blond haired city boy who transfers into his elementary school. But Takashi is actually half Japanese, and despite his appearance he doesn't even know English and loves eating Japanese food even Tamio can't abide.

Tamio and Takashi become friends, and despite his perplexity with Takashi's foreign appearance, Tamio quickly develops a strong attachment to the other boy. Tamio earnestly hopes that he and Takashi can stay friends forever. But Takashi remains dissatisfied with life out in the boonies, insisting that someday he's going to leave all this behind.

Yet Tamio continues to hope and to do anything he can to ensure that Takashi will stay with him--or take him along--no matter where he goes in life, with an intense, endearing, wistful sincerity perhaps telling of sentiments more complicated than Tamio might think.

1. Iku and Keita are childhood buddies. Naturally, having been friends for as long as they can remember, when one started to play baseball, so did the other. During their final year in middle school, Keita's baseball career abruptly ended as a result of the severe injuries he sustained when saving Iku from being hit by a truck. Presently, they go to the same high school. But ever since that accident, Iku has distanced himself from both the game and his friend, presumably out of guilt. What does Keita think about this? It also contains a couple of other short stories such as Utsukushii Asu and Sakura No Junrei. 2. The Sakura Pilgrimage Sugaya believes that guys like Fujishiro, a highly accomplished student rumored to be the next student council president, live in a completely different world and have no impact on his life. That changes one fateful day when he catches Fujishiro making out with a teacher after school. Fujishiro pays Sugaya for his silence, but not without a parting jab at how easily Sugaya's confidence was bought. This appears to be a collection of one-shots. Also contain Bokura no Ashita no Houteishiki (Extra - 6) Sequel to Iku and Keita's Story

Momoko is a fan of Hero shows, like the Power Rangers. The boy she liked in Junior High says mean things about her obsession and breaks her heart. In High School, Momoko tries to reinvent herself, and throws away all her Hero souvenirs. But at school, she is asked to join a Hero Club with 3 tall, handsome members who dress up as Hero characters and patrol the school. They want her to be their Pink Ranger. Even though the other girls are jealous, Momoko is too scarred by her past to embrace her love of Hero stories, and she doesn't get along at all with the Red Ranger.

From Dangerous Pleasure:

Takahiko can't stand Aizawa, a student in another class. As for the reason why, it seems that Aizawa has his eye on Takehiro, a mutual friend.

To save Takehiro from Aizawa's evil clutches, Takahiko plans an onsen trip so he can reveal Aizawa's true colors. However, when he hears about this idiotic plan, Takahiko's best friend Magi is nice enough to play along, but...

Of course there's no way it could all go according to plan. The result is something Takahiko never anticipated!

For the students at the same school, flowers of love bloom in total chaos!

From Intercross: Continuation of the oneshot Bokura no Himitsu o Kyouyuu Shiyou ka.

From Intercross:

1. Bokura no Himitsu o Kyouyuu Shiyou ka
Yuka goes to Ikimonogakari's room to ask them to solve her love problem, but unfortunately, they couldn't help her. To make her feel better, the people in the club gives her a piece of candy. Yuka eats it, and she suddenly gets cat ears and a tail! What happened to her? Will she ever go back to normal?

[T/N: Ikimonogakari literally means "(person) in charge of living beings"]

2. Colorful Shounen to Monochrome na Atashi
Naoki and Kiyo have known each other for a long time because they live in the same apartment complex. One Valentine's Day, Kiyo gave Naoki a chocolate cake, but Naoki threw it away and laughed it off. Because of that, Kiyo doesn't make sweets anymore! Because Naoki's dad is Kiyo's dad's boss and they are going on a trip, Kiyo has to make food for Naoki. Will Kiyo re-live the trauma of the past?
(Also included in the Sweets Fortune Telling Anthology as Boy of Macaroon story)

3. Kaibutsu-kun ni Rei
At the Christmas training camp, Yuzuki was paired up with no other than... that guy?!

4. Itoshi no Himeko-chan
Anri, who is usually bad at handling boys, is asked out by the school's most attractive guy, Takuma! This is so she can gradually get used to guys, however, does Takuma have another agenda in play? What is going to happen between the two?

5) Shiro no Kiseki

Subaru moves into a dorm and against his wishes becomes part of a Happy Set! But, with his allergies for cats and Sei's love for them, will the two ever really become a Happy Set...?

Hayashi Shoutaro is an otaku and a student who sucks at studying, the results showing on every test. And if that wasn't bad enough, he also calls out things like, the one who scores the lowest has to clean the classroom by themselves. In his class, there is a girl he likes, Kanda Yayoi, who always gets top scores and is popular among the whole class.

When he arrives home after cleaning the classroom, he's met by his perverted, otaku sister who has him cross-play (cross-dressing cosplay) to go to an anime merchandise display. There he meets Yayoi, who it turns out is also an otaku, and she falls in love with his cosplay persona...?

Boku wa Tomodachi ga Sukunai Shobo-n! is a spin-off comic series written by Kazehana Chiruwo and illustrated by Shirabi. It's a collection of oneshots focusing on the members of the Neighbor's Club and their relationships with each other.

1-2) I Want to be Myself and I Want to Know More About You
Ookawa Taketo is in love with his Biology sensei, Tsuruoka. After he confessed, Sensei refused to accept him because he was dumped once by a student before. Will Ookawa’s determination and his strong love convince Sensei?

3) Route 17
Runner Tsuji is confessed to by his kouhai, star athlete Teranishi, but without waiting for an answer, Teranishi tells him to forget about it and runs off!

4) Hope This Can Be Forever
Hiromi's cool exterior hides his growing feelings for Yutaka, but suppressing his emotions where his childish kouhai is concerned is getting more and more difficult. The day is coming when Hiromi won't be able to hold back anymore...

5) The Feeling of Love
Seiji always though a charming smile would get him out of trouble, so he grins idiotically all time. But classmate Inoue only wants to see Seiji smile for real.

6) The Four Seasons at the Toda Flower Shop
Florist Shougo has been alone since his wife Kana died five years ago. Well, almost alone, her annoying and cheerful nephew Takao is determined to stay close to Shougo, no matter what! Takao's love is definitely more than uncle/nephew, but what about Shougo's feelings?

7) Mint Candy
Miyahara's wedding is a reunion for former college classmates stoic Kuze and light-hearted Takeda. Even knowing how cool Kuze is, Takeda is still surprised at his nonchalance, since Takeda always thought that Kuze had a crush on Miyahara...

From Operation Boredom:

Jin is a rock artist in the making, and in a relationship with Tama, a wanna-be bread maker. However, as Jin's popularity grows, he feels he doesn't have enough time for Tama, and breaks up with her. Tama agrees to call it off... A little too easily. The two go off their seperate ways and decide to meet new people, but is their relationship really truly over? Watch their piping hot love slowly unfold!

From Tokyopop:

A rude girl and an effeminate boy switch bodies and find that it might be a better fit for both of them in this crazy comedy:

Nanako Momoi is the belle of high school... as long as she stays quiet. Once she shows her true self, guys' dreams are shattered for she is a true tomboy. Akira Uehara has the looks and brains, but, unfortunately, his personality is so dull it overcasts a shadow, and nobody notices him.

One day, Nanako's grandfather comes up with a crazy invention, and Nanako and Akira trade bodies! She's in his body, and he's in hers!

Inui Takeshi is the owner of a restaurant in trouble! He and his cute younger brother Yasutomo are trying to make a living, but business is just too slow. When regular customer and ex-host Ookami Kyousuke suggests an all-male version of a maid cafe, the brothers reluctantly agree to the idea. Ookami and fellow host Sannoumaru Miyabi move in with the Inui's and begin the adventures of Cafe Relish!

It's nature vs. nurture when a nerd swaps bodies with the toughest guy in school! Kang Too-Jee and Woo Soo-Choi have swapped...their bodies! After becoming the subjects of a mad scientist's experiment with her latest invention - the quantum teleporter - their bodies are switched, leaving only their minds and spirits intact. Woo Soo-Choi, who was once a model student, must face the life of Kang Too-Jee, a teenage menace. Never having an enemy in his life, he now has to deal with the handful of Kang Too-Jee's list, but will his kinder, gentler demeanor ward off his rivals? Or will survival determine his future? Will he become the hardened fighter that matches his new exterior?

In Change 123, we meet Motoko, a girl with a very strange problem. In order to cope with her 3 adoptive fathers' incredibly intensive training methods, she developed multiple personalities, each with a different martial specialty. But what happens if none of them can beat her opponent on their own? And what further nugget of wisdom will be imparted by the great Kamen Raider?

From all over Japan, Yankee Boys (hoodlums) full of dreams and ambition gather in Gure Tokyo. Then Chagecha appears with his unorthodox "Yanki," and changes everything!!

Short, cute 4-koma about an ageing cat's digestive problems.