Edit: Replaced with proper rip, previous one used wrong profile when converting ppm to jpg (apologize for this, but the batch rip is done long time ago), this should be more closer to raw now. The difference can hardly be seen by bare eyes, you only need to re-download this gallery if you are super hardcore on quality.

#229 of 2D Dream Comics.

There is an English translated version, which is pretty neat in quality, tho it is a bit downscaled.

bought and ripped from
http://www.dlsite.com/books/work/=/product_id/BJ008898.html/
If you have DRM free PDFs and not sure how to rip them, you can send them to me and I'll try to help.

info on mugi database:
http://doujinshi.mugimugi.org/book/383985/Pheromone-Days/

physical version:
http://www.amazon.co.jp/gp/product/4799200399/

contents:

page 005-024
セックスコンバート
from: 性転換アンソロジーコミックス Vol.4 (二次元ドリーム電子アンソロジー026)

page 025-044
EVIL PASSION
from: 催眠アンソロジーコミックス (二次元ドリームコミックス213)

page 045-062
Punishment
from: 闘神艶戯 Vol.3

page 063-082
Treasure of Curse
from: 闘神艶戯 Vol.5

page 083-102
POLICE NOTE
from: 闘神艶戯 Vol.12

page 103-118
Wanted Inc.前編
from: 闘神艶戯 Vol.7

page 119-134
Wanted Inc.後編
from: 闘神艶戯 Vol.8

page 135-154
MISSION Ω
from: 女スパイアンソロジーコミックス Vol.1 (二次元ドリーム電子アンソロジー023)

page 155-172
KILLER×KILLER
from: 闘神艶戯 Vol.1

Base +15, AlekSlayer +10, mas1192 -3, HGazer +23, Sushilicious +35, aloc1234 +27

My gallery was extracted from this source:
(成年コミック) [双龍] フェロモンデイズ 電子書籍版 [2011-03-24].pdf wollofAmRsE01Tkz 24,324,032 ddfcace940cf55dedd9441904d2854eb4da73f9e

I will delete it.

Base +20, Sushilicious +35

English version:- https://e-hentai.org/g/482339/0072b968ff/

Base +8, Faire +8, Der Fuhrer +8, Orangepulp +10, Zero Angel +38, butt1234123412341234 +5

One of the best I've seen in a while.

Base +10, Zero Angel +38

5,6,7,11,20,37-40,170,171

Base +3