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In the Kokoro series:

Vol.1 - Otokogokoro (A Man's Heart)

1 & 2. Otokogokoro & Otonagokoro
Salary man Saki almost makes it home but passes out from fever just as college student Shinomiya passes by. When Saki comes to he realizes he's in a strange apartment and Shinomiya has been taking care of him for the past two days! Not wanting to be indebted, Saki tries to repay him as thanks but Shinomiya's having nothing of it. Luckily, Saki's pretty creative when coming up with a way to express his gratitude that has them both wanting more...

3-4. Kiss Kiss Kiss

5. Nibukoi (Dull Love)

6. Hiiragi-senpai no Koi no Ohanashi

7. W Pure

Vol.2 - Koibitogokoro (Heart of Lover)

Vol.3 - Koigokoro (Heart of Love)

Vol.4 - Tokimekigokoro (Heart of Excitement)

The number of chapters comprising the main story in each book is as follows:
Otokogokoro (2 chapters),
Koibitogokoro (6 chapters + omake) entire book,
Koigokoro (2 chapters + omake), and
Tokimekigokoro (5 chapters + extras) entire book.

Behold the the struggle of the adorable little cockroach Gokicha-chan as she struggles to make friends with humans after moving to frigid Hokkaido to escape the unfortunate reputation her species enjoys in the Kanto region.

Kang Chan and Seyeon have been close friends since they were young after being introduced by their parents. After entering high school, Seyeon suddenly received a confession from Kang Chan and became aware of Kang Chan since then. Meanwhile, Naeun is displeased with their relationship. The trivial and noisy story of their love triangle and those around them...

1967, summer. Kenichi, a 11 years old boy, discovers a magic mountain, thanks to a salamander confined in a museum.

In the year 21XX, robots are a typical part of everyday life. Even in this world however, Mono-1 is quite the oddity as the newest model of Robot. Although her intelligence is at the level of a child, her creator designed her to grow through observation, and leaves her in the care of his son, Morohito, to help her find new experiences to learn from

Kentarou is a plain, nondescript college student who has never had a girlfriend or any friends. After getting hit on the head by a wayward ball, he begins to notice that there are increasingly long periods of time in which he cannot remember what he was doing.

One afternoon, he regains consciousness in an apartment he'd never been to before - and sitting next to him is a young man who then tells him "You're being possessed by the spirit of my dead girlfriend"...

Published on NHK Domo Manga Desu on-line website. It should be an irregular series but it is not clear if every chapter will feature the same characters or if it will be a series with a general theme but made by multiple one-shots with different protagonists.

Shūhei Wakatsuki, a man who lives and works in Tokyo, decides to take his girlfriend and her son to his old home to see his parents on New Year's Eve. While driving, memories of his father, with whom he had never gotten along, begin to surface. When they arrive at his parents' house, he and his father silently sit down to watch a New Year's TV show together and begin to talk

A worthless husband and his carefree wife. 54 short stories of their heartwarming, funny, and sad life. Winner of the Tezuka Osamu Cultural Prize and Japan Media Arts Festival grand prize Kono Fumiyo gives us this heartfelt short comedy.

The story of the Sasakura Ryu and Eden Hall, a small cocktail bar in the Chiba area of Tokyo, where troubled customers come for the "glass of the gods," which with Ryu's assistance helps them to resolve their often highly emotional problems.

The above is the synopsis of the anime. In the manga, Ryu starts out working in a bar called Lapin.

An 18 year old girl that is in love with her step brother who is same age as her and goes to the same school. She leaps through time and finds herself all grown up... what will happen on this crazy adventure to find true love? Stay tuned to see an amazing story of a high school girl's first love that will be a thriller to read.

Komugi has lived most of her life at home, until one day when her father suddenly comes home with two tiny men. These two tiny men are the incarnations of legendary enchanted cookbooks. Komugi's Dad charges the two, French Cuisine and Japanese Cuisine, to live with and cook for his daughter. How will Komugi cope with the two tiny rambunctious and handsome guys?

2500 years ago, Buddhism was formed from the teachings of Buddha. The oldest remaining scripture that most closely embodies the teachings and wisdom of the founder, Buddha, is “the Word of Buddha (Sutta Nipata)”. What are the teachings that Buddha shared to the people, these simple teachings that express what is at the heart of Buddhism? Buddha’s life and his ideas, filled with benevolence and wisdom, have been adapted into comic book form.

Tamaki is in love with Shinji. He's a spoiled, arrogant and self-centered guy and lately he's been playfully clinging and getting too close to Tamaki to deal with tension. Thinking that this can't go on, Tamaki is determined to distance himself from Shinji, but it just makes him want to see Shinji all the more.... It's a series of school love strories that will leave your heart and body throbbing.

Original art of Ogawa Chise released on Twitter.

The boy who sits next to Yokoi in class, Seki-kun, is always up to something at his desk. He manages to somehow play very elaborate games without attracting the teacher's attention. From dominoes, to shogi, to go, to mecha models, to playing with cats and more, he always has something new to do. Yokoi often finds herself getting reluctantly interested in his games, even though they always seem to end up getting HER in trouble!

The manga was nominated in the 5th Manga Taisho Awards.

A jobless man with hopes of entering a Tokyo university begins living in an aparment building where everyone is busy studying to do the same.

Chitose is an 11-year-old girl who is madly in love with an older guy named Hiroshi. He works at the town hall right next to the school and Chitose spends every day relentlessly pursuing him. Can Chitose ever convince Hiroshi to go out with her?