[Azuki Kurenai] Midara no Houteishiki - The equation of the Immoral Ch. 1-2 [English] [hen-toy]
(C59) [Tomoyosama (Kayama Akihiro, Ozawa Hiroe)] Tomoyo No Yasashii Houteishiki (Cardcaptor Sakura)
[Anthology] Kimusume Kanojo no Hatsujou Houteishiki [Digital]
[Sena Youtarou] Kannou no Hirusagari | A Sensual Early Afternoon (Kannou no Houteishiki) [English] [QBtranslations]
[Uruudoshi (Uru)] Seiai no Houteishiki (30-sai no Hoken Taiiku)
[ITOYOKO] Kichiku Houteishiki - Equation of brutal person
[Fumizuki Kou] Koi suru Houteishiki
(C74) [Momonga Club (Hayashibara Hikari)] Shoujo no Houteishiki - Girls of Equation
[Azuki Kurenai] Midara no Houteishiki: The Equation of the Immoral
[Yuiga Naoha] 4P Houteishiki (COMIC P Flirt Vol.10 2011-04)
[Azuki Kurenai] Yoru no Houteishiki 1 | Equation of the Night 1 [English] [Hentai-Enishi] [Decensored]
[Hiyoshi Hana] Neko to Watashi no Houteishiki | The Equation of the Cat and Me (COMIC Megastore 2012-02) [English] [The Lusty Lady Project]
Chigiri to Musubi no Houteishiki - Equation of Chigiri & Musubi
Koi no Riron Ai no Houteishiki
Kimusume Kanojo no Hatsujou Houteishiki
Kirei na Onna to H no Houteishiki
Sprechchor to Houteishiki | Chorus and Formula
Kirei na Hito to H no Houteishiki
Neji to Nejiana no Houteishiki
Midara no Houteishiki - The Equation of the Immoral Kanzenban
Nurume no Houteishiki.
Kannou no Houteishiki
Atatame no houteishiki
Rina-chan Renai Houteishiki
Eien no Houteishiki - Eternal Equation Chapter: 1
Pain Jakase no Aishita Renketsu Houteishiki
Kannou no Houteishiki (decensored)
Midara no Houteishiki
Chigiri to Musubi no Houteishiki | 契與結的方程式
(C77) [Umemoto Seisaku Iinkai (Sakayama Shinta)] Nurume no Houteishiki. (Toaru Kagaku no Railgun) [Chinese] [婭娘性魔法宣傳暗部漢化組]
[Sena Youtarou] Kannou no Christmas Eve | 官能的平安聖夜 (Kannou no Houteishiki) [Chinese] [夢中璞影個人漢化]
[Hiyoshi Hana] Chigiri to Musubi no Houteishiki | 契與結的方程式 [Chinese] [Digital]
(C77) [Chidorinu] Boku to Kanojo no Houteishiki (Love Plus)
[Azuki Kurenai] [Full Color seijin ban] Midara no Houteishiki - The Equation of the Immoral Kanzenban
(C94) [x-GAME! (Mochiko)] Neji to Nejiana no Houteishiki (Heybot!)
[Ecologist (moro)] Sonoyasashisaha. Mawatanoyouni Yawarakaku [Digital]