From YaoiOtaku:

A story about an excellent and manly salaryman, whose beauty is extraordinary? the senpai Kitagawa-san and his, although dumb, but very handsome kohai, Nakamura-kun. In the middle of night with a bottle of sake, a very girlish confession of the sort "Oh là-là, it's hentai!", is to hover over the poor kohai Nakamura-kun. Backed up with his very own fantasies and undeniable desires, he jumps his sempai Kitagawa-san.., unexpectedly though Kitagawa-san doesn't have anything against it!! Two young boys, two love birds start the beginning of their love story! The very awaited book ? written especially for you!

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

Honda and Shibuya work at the same company and live in the same apartment complex. One day while Honda was doing his laundry, he noticed something unusual...it was panties! Shibuya comes rushing in and finds that he had left one of his precious men's lingerie!

Shibuya tries to explain to Honda his lingerie fetish and at first Honda didn't care but he slowly got sucked into it and became infatuated with Shibuya's lingerie fetish and ending up pulling down his pants to see Shibuya wearing strawberry print panties! And the pantie pursuit starts!