In feudal Japan, a young boy who can see the future through his dreams struggles to protect those closest to him.

Our boys go to the hot spring in the spring! But... Will they enjoy their stay when there's a snowstorm, a bear prowling outside and a power outage?!

Businessman Aoe is trying to leave so his student lover can study. But that is proving to be difficult.

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

Oku meets Nana again after they slept together long ago. In the past, Nana was The Prince of Good Fortune. There was a jinx that any woman who slept with him would become lucky and their wish granted. So, Oku asks Nana to try sleep with him to see if he can also make guys lucky as well. However, Oku's purpose wasn't about luck but his secret feelings.

Mistaken identities, bizarre accidents and pratfalls, tragic pasts and plenty of broken hearts, and that is just for starters! Love Mode tells the story of the lives of the men involved with the classy male escort service, Blue Boy. Love lines intertwine and cross, friendships are made and broken in this boy's love classic!

Sakashita Izumi, your typical straight high school student, gets into a sticky situation with a gay translator, Takamiya Katsura, when he gets mistaken for Izumi - an escort from B&B (Blue Boy)! The two go on a date, Takamiya goes all the way with the young Izumi, and now the older man's in love with him. Tiny Problem: Izumi is slightly homophobe. Will he eventually convert in that which he fears?

Reiji, owner of B&B and other sleazy clubs (and seemingly not gay) finds out his girlfriend had been cheating on him. Just after dumping her, he bumps into a young, family-less, money-less, trustless high schooler named Naoya, who at that moment gets knocked out by a pot that Reiji's vengeful ex-lover drops on his head. Reiji accompanies the young boy, feeling bad that this is partly his doing, only to find that now Naoya is homeless since his apartment burned down and finally ends up taking in this "stray cat".

Some other extras include:
Volume 8:
Love Mode: Dreamers story
Love Mode: Conditioned response

Included one-shot:
Volume 10: The Reason I Touched Teacher

After the death of his grandmother and only remaining relative, Shinakawa Raizou moves in with the mysterious Mitou family as their housekeeper. He soon learns the Mitou family's secret: the Mitou can use great power with only their words. But because this power harms the body of the user, the Mitou pair up with human-like paper dolls to transfer their wounds to them through bodily fluid contact.

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Ze 2012 extra
Ze gashuu iro no hon - Artbook

From Yaoi Is Life:

Featuring events such as Genma being immature and making Ryuusei drink more than he can handle, Himi begging Genma until his anger subdues, Asari teasing Shoui, and Waki trepassing into Raizou’s bedroom. This volume contains spin-offs of the -ZE- series. Most of these were created for autograph events and freebies during purchases. There's also a 26-page compilation of never before seen new material! No matter where you open it, this is a -ZE- full of love scenes! ♡

Itokawa has just moved out to his deceased grandfather's house. After being told that the house has been kept up while his grandfather has passed away he is in for a rude awakening when he gets there. He meets a bunch of interesting people that live there...