At a Shinto shrine in Shimoda, there is a large rock. It is said that if four close friends gather around the rock and all wish for the same thing, that wish will come true. As four friends, Natsumi, Saki, Yuka and Rinko, gather around the rock like they used to in their childhood, they soon find the rock can indeed grant people's wishes. With only a short amount of time before Saki is due to transfer schools, the girls spend a summer filled with magic.

After being bullied at his previous school, Kugishima transfers to an all boys boarding school to make a fresh start. But his roommate Matsudera is a weirdo... and he was doing "it" with another man?! What's more, Matsudera kisses him and says, "You are so cute, it makes me want to play with you."
In the quite, secluded all-boys school filled with perverts, what will Kugishima's fate be?

Series of 5 oneshots:

1) Natsu Jikan
A boy goes to meet a stranger after his mother died. The mother left a lot of love-letters to this man...

2) Torrid Night
After years have past Takaaki has returned to his childhood home and his stepbrother Nozomi. They are the only family they have left, and both hold secrets from the past that can destroy them. But the dark passion they feel is dangerous too...

3-4) That's What God Says & Sweet Little Devil
Izumi and Tetsuya are neighbors, both with very similar problems. Does one's appearance really determine who you are or how you should be? Were these neighbors fated to be together?

5) The Sleeping Man
Naoki and Tatsuya were high school classmates and close friends, with Tatsuya having the task of waking up his ever sleeping friend. They agreed to meet at the dawn of the new millennium, and though they both show up, there's something off....

A rural seaside village. A house near the ocean that only opens up on vacations. No matter how much time goes by, we will never forget those days...

The summer before starting college, Fuuka decides to work part-time at a beach house. There he meets Jun, the youngest son of the owners. Jun is always crying or laughing and is so full of emotion that it causes nothing but trouble. Still, Fuuka finds it impossible to tear himself away from this boy, two years his junior and yet closer to his heart than anyone else has ever been. But even the longest summer has to end sooner or later.

(Adapted from the description by Hoshikuzuu Scans)

Natsume Shiranui is a high school sophomore who has the face of a thug. Intimidating, yet wholesome, he holds affections for Natsume Minadzuki, his beautiful and popular classmate, as he admires her because she's always been there for him, himself aiming to become, for her, every bit the hero she already is for him.

A story of two Natsumes.

Arata Natsume works at a child guidance center, is in his thirties and single with no plans for marriage. But one day, he receives a request from the child he was in charge of, Takuto, to "meet the criminal who killed his father". That serial killer is Shinagawa Shinju, also known as the "Shinagawa Pierrot".

Celebrating ten years of work since her artist debut, this booklet features characters from No Color, Rakuyoukan Wide Show (Free Punch second/side story), Haru Nanode (Doushiyoumo nai Karedo second/side story), Tight Rope, Sugar Code, and Ikasama Memory.

From MAL
This fanbook contains short manga as well as illustrations, an interview, and features about Natsume Isaku's working habits. There are a series short manga starring the characters from all of Natsume Isaku's mangas interacting with each other. Other mangaka also contribute short manga featuring Natsume Isaku's characters. 50 new pages have been drawn especially for this fanbook.

[From Nakama]

Since there is no back cover blurb here are the contents:

Natsume Isaku Special Illustrations
Let's go to the super bath-house! … 3
Amber Paradox - Masaya and Satoshi … 11
Amber Paradox - Tale of the Night … 18
Tight rope - A tale, half asleep and half awake … 27
Doushiyoumo Nai Keredo - Night of sake … 36
Doushiyoumo Nai Keredo - Let's go to my parents' house! … 41

Popularity poll results — publication … 53
Question for Natsume Isaku-sensei! … 64
Color Illustration Selection … 65

Guest Comics
SHIMIZU Yuki Sugar Code Yakuza Man … 97
YAMASHITA Tomoko Amber Paradox Onoe is definitely set to smash an important setting* … 101
AMAGAKURE Gido Doushiyoumo nai keredoYou're cute whatever you do … 105
AMAGAKURE Gido Ikasama Memory A promising future … 111
YAMADA Nichoume Heart no Kakurega Arm pillow … 113
YAMADA Nichoume Heart no Kakurega Rolling arm pillow … 115
YAMADA Nichoume Doushiyoumo nai keredo
A satisfactory arm pillow … 116
MONCHI Kaori Tight rope Sleeping on someone's lap … 117
Koshino Amber Paradox Paparazzi hotel … 122
— Guest Profile & Message … 124

Uncompiled Tankoubon Comic and Illustration — Re-compilation
Doushiyoumo nai keredo Flower Friday ④ … 126
Doushiyoumo nai keredo Before the morning sparrow disappears … 141
Doushiyoumo nai keredo Something very unexpected** … 149
Tight rope Ryuunosuke's Delusional Diary Part II … 153
Sugar Code Limited AGF book (2010) Special Illustration … 164
— Comic papers … 140, 165
— Illustrations and cuts … 172

Natsume Isaku Long Interview … 174
A look at my working space!! … 183
Super storyboard exhibit!! … 184
“Tightrope” OVA Creation plan exhibit!! … 185
Character rough plans exhibit!! … 186
Background illustrations exhibit!! … 188
“Heart's refuge” Tenement house room assignment and arrangement exhibit!! … 189
Natsume Isaku publication list … 190

From Storm in Heaven:

Natsume's just an ordinary kid, except he can see spirits, just like his grandma Reiko could. Reiko, though, used to bully the spirits, and bound them to her will in the "Book of Friends". Now that Natsume has inherited this book, a never-ending stream of spirits is coming after him. With the help of a spirit "cat" (who really just wants Natsume to die so he can have the book), Natsume spends his days dissolving the contracts that bind the spirits and trying not to get killed.

Extras:
? Manabiya no Sumi (The Corner of the Schoolhouse) in v.6.
? Natsu ni wa Tameiki (w)o Tsuku (A Midsummer Sigh) in v.7.

Nominated for the 1st Manga Taisho in 2008.

Yousuke and Natsume are childhood friends. Yousuke assumes it's natural that Natsume would know a lot about him, seeing as they've lived next door to each other for years, but one day, he discovers a secret...

From KCG scans:
Hibi Kaho is a first year high school student with a love for the muscular. Spending her days admiring the muscles of club members has become her routine—until she meets the muscular prince, Natsume-senpai of the basketball club. Those biceps! Those abs! Kaho has fallen head over heels again. And when Natsume asks her to be the basketball club manager, her muscular-filled days start!

From Shoujo Crusade:

"I wanted to create a summery, sparkling youth." - And so the theme is "yosakoi*"!!

For the sake of medical treatment for her younger sister, Natsume ending up moving from her home to Shikoku. In a place where no one knows her, she'll make her high school debut as a "cool beauty"! ...This determined Natsume is approached by the wild child-like Yudai saying, "enter my team"??

Eeh!!? What do you mean by team!!?

*For more info on Yosakoi go here.

Michiharu is the only failing student in a highly educated family. His father tells his failing son to go visit a relative’s house to get lessons. When Michiharu visits his relative’s house during summer break, his cousin Natsuki, who is rumored throughout the city for being “extremely gay” is standing there, waiting for him! Natsuki insists that not only will he teach him how to study, he will also teach him how to play in the night…!?

Coil is a man whose idea of "life" is his alter ego in an online world. A place where the hearts of people come together...and it is not a pretty place. The slender spiderweb that connects their souls within this endless world brings greater pain than reality itself.

Maki lives with a family thats very dependent and demanding of him. He finds relief with Tasuku, a young looking man who cant seem to do anything himself. Being more than happy to help Tasuku out, as he is finally given a thank you for his efforts, he easily falls for the younger looking man. Things are happy between them until Maki learns just who Tasuku is, and then misadventures ensue. Two side stories are included.

From Stiletto Heels:
Hazuki falls in love at first sight with a flower shop owner named Rokka and decides to get closer to her by applying as a part-time employee.
A going-away party soon brings him to her doorstep, and Hazuki is elated. But what happens when he discovers that residing in her apartment is the spirit of the man she can never forget?

From MangaHelpers:

Second baseman Kaizu Chiaki is a normal senior high schooler who aims to reach the Koshien with his teammates and worries about his future career. One day, a new teacher arrives at his school. Her name is Takamine Touko. Crossing the boundaries between teacher and student, Chiaki and Touko find themselves gradually attracted to each other. [DrCoke]

There's a reason why I help clean the school swimming pool. And the reason is a bit sentimental.

One day, Yuuri, a pretty high-school girl, is asked by a stranger to attend the funeral of Hirose Takaya saying he had really liked her. Who was this guy, and why did he like her?

A collection of stories, Includes:

1) Natura-turaly from Joshi BL
My twin brother and I, we like and dislike the same things. Whatever we do, we do together. I thought we’d always be together—it seemed obvious. But a man appeared who says he loves my brother. Is the world I thought would go on forever starting to collapse?!

2) Veranda Nite (On the Veranda)
A boy moved to a new apartment but when he goes out on the veranda to smoke, he encounters something out of this world.

3) Count 3632
A boy gets trapped in an elevator with a not very nice novelist.

4) Step One
Suichi does not like to socialize with people. Why does Hana keep finding excuses to talk to him?

5) Test Play from Itai Ero
A couple's relaxed routine is disrupted when the one partner proposes a new kind of play. To his surprise, his significant other discovers a higher affinity to his role than expected.

6) Michidzure from Gesu BL
A boy who is easily roped into things & a cool beauty who is a natural asshole.

Extra: Prologue & Afterword