Title: Togainu no Chi
Mangaka: Chayamachi Suguro
Published in: Comic B'sLog 2006/03 - ???
Status: 6 volumes. Licensed in English by TokyoPop
Scanlated: Dangerous Pleasure
Title: Togainu no Chi
Mangaka: Tomoe Sato \ Yamamoto Kana
Published in: Magazine ZERO vol. 48 & vol. 49 (Fall 2005)
Status: 1 volume. The first two chapters were published before Biblos went bankrupt.
Scanlated: Dangerous Pleasure
Title: Nitroplus Chiral Official Works Togainu no Chi
Publisher: Nitro+ Chiral
Summary: Rough versions of the CGs, character sketches and a novel. Color and black and white.
Date: Aug. 2005
Pages: 48
Scanlated: Dangerous Pleasure
Nitroplus Chiral Special-Edition
Publisher: Media Works
Summary: Color artwork including information for the PS2 version and Lamento. Includes the CGs from both games.
Date: ???
Pages: 75
Scanlated: No.
Title: OMEKASHI
Publisher: Nitro+ Chiral
Summary: An artbook illustrated by different members of the Nitro+ team.?
Date: Dec. 2007
Pages: 20
Scanlated: Dangerous Pleasure
Title: Togainu no Chi Official Visual Fan Book
Publisher: Enterbrain
Summary: Includes CGs from the game, character profiles, plot information, ending guide, sketches, interviews and merchandise list.
Date: Apr. 2006
Pages: 128
Scanlated: No.
Title: Togainu no Chi Anthology Comic # 1
Publisher: Enterbrain
Summary: ???
Date: Aug. 2005
Pages: 146
Scanlated: Ch.4 done by Dangerous Pleasure
Title: Togainu no Chi Anthology Comic # 2
Publisher: Enterbrain
Summary: ???
Date: Sep. 2005
Pages: 146
Scanlated: No.
Title: Togainu no Chi Anthology Comic # 3
Publisher: Enterbrain
Summary: ???
Date: Nov. 2005
Pages: 146
Scanlated: No.
Title: Togainu no Chi Anthology Comic # 4
Publisher: Enterbrain
Summary: ???
Date: Dec. 2005
Pages: 146
Scanlated: No.
Title: Togainu no Chi Unlimited Comic Anthology
Publisher: Broccoli
Summary: ???
Date: Sep. 2005
Pages: ???
Scanlated: No.
Title: Togainu no Chi Comic Anthology Light x Shadow
Publisher: Bunendou
Summary: ???
Date: Nov. 2005
Pages: ???
Scanlated: No.
Title: Togainu no Chi Anthology Comic Shiki Rin Hen
Publisher: Enterbrain
Summary: ???
Date: Feb. 2006
Pages: 146
Scanlated: No.
Title: Togainu no Chi Anthology Comic Motomi Keisuke Hen
Publisher: Enterbrain
Summary: ???
Date: Mar. 2006
Pages: 146
Scanlated: No.
Title: Togainu no Chi Anthology Comic Nano Visukio Hen
Publisher: Enterbrain
Summary: ???
Date: Apr. 2006
Pages: 146
Scanlated: No.
Title: Black Milk
Circle: Inugata Summit
Pairing: Shiki x Akira
Note: Prequel to Mill Milk
Scanlated: Broken Promise
Title: Evil Lova
Circle: Inugata Summit
Pairing: Shiki x Akira
Scanlated: Blissful Sin
Title: Fuwatoro
Circle: Inugata Summit
Pairing: Shiki x Akira, Motomi x Akira, Keisuke x Akira, Gunzi x Akira, Nano x Akira
Scanlated: Dangerous Pleasure
Title: Honey Star
Circle: MR-GT
Pairing: Shiki x Akira & Rai x Konoe
Note: Lamento crossover
Scanlated: Broken Promise
Title: Mill Milk
Circle: Inugata Summit
Pairing: Shiki x Akira
Note: Sequel to Mill Milk
Scanlated: Dangerous Pleasure
Title: Open Invitation
Circle: Inugata Summit
Pairing: Akira x Keisuke x Akira
Scanlated: Trine
Title: Sexsual Asphyxial -Reunion-
Circle: Nao
Pairing: Kiriwar x Gunzi
Scanlated: Dangerous Pleasure
Title: Tokimeki Natsuinu Graffiti
Circle: Inugata Summit
Pairing: Shiki x Akira
Scanlated: Dangerous Pleasure
Title: Thug Life
Circle: Nao
Pairing: Kiriwar x Gunzi
Scanlated: Dangerous Pleasure
For a current list of scanlated doujinshi, you can check out MangaUpdates.