Volume 1 & 4 are both Sailor Moon doujinshi.
Volume 2 is a Saber Marionette J douijinshi.
Volume 3 is a Sailor Moon & Final Fantasy VII doujinshi.
Volume 5 is a Vampire Savior & Darkstalkers doujinshi.
Volume 6 is a Battle Athletes Victory & Sailor Moon doujinshi.
Volume 7 is a Street Fighter Zero 3 doujinshi.
Volume 8 is a Final Fantasy VII doujinshi.
Volume 9 is a King of Fighters doujinshi.
Volume 10 is a Street Fighter, King of Fighters, Sailor Moon & Breath of Fire doujinshi. Contains one page with yaoi.
Volume 11 is a Garou Mark Of The Wolves doujinshi.
Volume 12 & 13 are Variable Geo doujinshi.
Volume 14 ASSmanga Oukoku (ASSmanga Kingdom), frequently called (incorrectly) ASSmanga Daioh, is an Azumanga Daioh doujinshi that deals with Yomi's repressed sexual urges and her subsequent fantasies.
Volumes 15-17 & 19-20 take place in the "Private Risshin Seminary" a school that acts as the proving ground for the governments latest program to battle population decline. Boys are given aphrodisiacs and the girls are made to regularly service them.
Volume 18 is a Daphne in The Brilliant Blue doujinshi.
Volume 21 is a Zero no Tsukaima doujinshi.
Volume 22 is a Houkago Play doujinshi.
Volume 23 ♀ no Ana - Bitch Hole is an "original" doujinshi about a high school girl who serves men in a public toilet.
Volume 24 Shadow Rune is a Street Fighter doujinshi.
Volume 25 ReHOLE is an "original" doujinshi about weird high school anal sex.
Volume 26 Shiko-Shiko Supporter is an "original" doujinshi about high school anal sex.
Volume 27 BACK SHOT! is an "original" doujinshi about high school prostitution.
Volume 28 Majime Bitch no Shiyou Hou. is an "original" doujinshi about a high school girl prostitute who starts dating a boy her age.
Volume 29 Sakusei Yuugi Milking Game JK is an "original" doujinshi about a group of high school girls dominating high school boys.
Volume 30 Yatsume to, Nanao no Hachi-Nana Shiki Choukyouiku is an "original" doujinshi about two crossdressing boys/traps and a girl having anal sex.
Volume 31 Shouko-san no Onaho Sengen!
Volume 32 OriAna - Jail & Hole is an "original" doujinshi about high school group sex.
Volume 32.5 NukiAna - Glory Hole is an "original" doujinshi about high school glory hole sex.
Volume 33 Majime Bitch no Kousai Hou. is an "original" doujinshi, continuation of volume 28.
Volume 34 DT HUNTER-W is an "original" doujinshi about high school sex, including threesome sex.
Volume 35 RENTAL HOLE is an "original" doujinshi about high school girls prostituting themselves to obtain funds for their club. One of the girls has emotionless sex both with customers and her younger brother.
Volume 36 Majime Bitch to Ichiban Benki. is an "original" doujinshi about two high school girls and a boy having sex.
Volume 36.5 Maya no Kareshi to Ichiban Benki. is an "original" doujinshi, a bonus of volume 36.