Kirei na Hito to H no Houteishiki
[Akuochisukii Sensei] Akuochisukii Sensei no Heroine Haiboku no Houteishiki - Equation of Heroine's defeat by Mr. Akuochisukii [Digital]
Kimusume Kanojo no Hatsujou Houteishiki
Chigiri to Musubi no Houteishiki | 契與結的方程式
[Azuki Kurenai] Yoru no Houteishiki 1 | Equation of the Night 1 [English] [Hentai-Enishi] [Decensored]
(Zero no Hakobune) [Shiroan (RUNa)] Koi no Riron Ai no Houteishiki (ALDNOAH.ZERO)
[Hiyoshi Hana] Kare to Imouto no Houteishiki | The Equation of Him and His Little Sister (COMIC Megastore 2012-08) [English] [The Lusty Lady Project]
[Carn] natsu×umi=Kiken no Houteishiki (Shinzui SUMMER Ver. Vol. 2) [Decensored]
[Azuki Kurenai] Yoru no Houteishiki 1 | Equation of the Night 1
(C74) [Momonga Club (Hayashibara Hikari)] Shoujo no Houteishiki - Girls of Equation
[Kinako Gyuu Nyuu (Tomoharu)] Koi Suru Houteishiki (Ginga e Kickoff!!)
Chigiri to Musubi no Houteishiki - Equation of Chigiri & Musubi
Midara no Houteishiki
(Makitan!) [Niratama (Sekihara, Hiroto)] Sprechchor to Houteishiki | Chorus and Formula (Love Live!) [Chinese] [北京神马个人汉化]
[Yuiga Naoha] 4P Houteishiki (COMIC P Flirt Vol.10 2011-04)
[Gentsuki] Yasashisa no Houteishiki | Tender Equation (COMIC BAVEL 2017-08) [English] [N04H] [Digital]
Neji to Nejiana no Houteishiki
[Hiyoshi Hana] Chigiri to Musubi no Houteishiki - Equation of Chigiri & Musubi [Digital]
[Hiyoshi Hana] Neko to Watashi no Houteishiki | The Equation of the Cat and Me (COMIC Megastore 2012-02) [English] [The Lusty Lady Project]
[ITOYOKO] Kichiku Houteishiki - Equation of brutal person
[Hiyoshi Hana] Youma to Tsuya no Houteishiki (COMIC X-EROS#17) [Chinese]
Koi no Riron Ai no Houteishiki
Atatame no houteishiki
[Azuki Kurenai] Midara no Houteishiki - The equation of the Immoral Ch. 9 [English] [SaHa]
[Sanbun Kyoden] Kindan no Houteishiki
[Sena Youtarou] Kannou no Christmas Eve (Kannou no Houteishiki) [English] [Team Koinaka]
Midara no Houteishiki - The Equation of the Immoral Kanzenban
[Azuki Kurenai] [Full Color seijin ban] Midara no Houteishiki - The Equation of the Immoral Kanzenban
Rina-chan Renai Houteishiki
[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]
Kirei na Onna to H no Houteishiki
[Anthology] Kimusume Kanojo no Hatsujou Houteishiki [Digital]
[Azuki Kurenai] Midara no Houteishiki: The Equation of the Immoral
Rina-chan Renai Houteishiki
[Azuki Kurenai] Yoru no Houteishiki 1 | Equation of the Night 1 [English] [Hentai-Enishi] [Decensored]
Kannou no Houteishiki
[Azuki Kurenai] Midara no Houteishiki - The Equation of the Immoral [English] [hen-toy]
[Kihiru] Kirei na Onna to H no Houteishiki [Digital]
(C77) [Chidorinu] Boku to Kanojo no Houteishiki (Love Plus)
[Hiyoshi Hana] Chigiri to Musubi no Houteishiki | 契與結的方程式 [Chinese] [Digital]
[Akuochisukii Sensei] Akuochisukii Sensei no Heroine Haiboku no Houteishiki - Equation of Heroine's defeat by Mr. Akuochisukii | 女性角色敗北的方程式 [Chinese]
[Carn] Natsu x Umi = Kiken no Houteishiki | Summer x Beach = Dangerous Equation (Shinzui SUMMER Ver. Vol. 2) [English] [Rage Manga] [Decensored]
[Hiyoshi Hana] Chigiri to Musubi no Houteishiki (COMIC ExE 01) [Chinese] [無邪気漢化組]
[88scones (Sakaki Tsui)] Ayaki-kun to Houteishiki [English] {Shotachan}
[Sakura Hikomaru] Imouto no Houteishiki [Chinese]
[Sena Youtarou] Kannou no Hirusagari | A Sensual Early Afternoon (Kannou no Houteishiki) [English] [QBtranslations]
[Momonga Club (Hayashibara Hikari)] Shoujo no Houteishiki - Girls of Equation [English] [SaHa] [Digital]
[Gentsuki] Yasashiisa no Houteishiki - Tender equation (COMIC BAVEL 2017-08) [Chinese] [揮淚錦馬超漢化] [Digital]
[Fumizuki Kou] Koi suru Houteishiki
[Hiyoshi Hana] Kare to Imouto no Houteishiki (COMIC Megastore 2012-08)
Sprechchor to Houteishiki | Chorus and Formula
Nurume no Houteishiki.
(C93) [Mugen Houteishiki (Mutsu Minato)] Chaldea Sakusei Nisshi (Fate/Grand Order)
[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)
Pain Jakase no Aishita Renketsu Houteishiki
Neji to Nejiana no Houteishiki
(C87) [Mugen Houteishiki (Mutsu Minato)] MOSI×MOSI (Kantai Collection -KanColle-)
[Mugen Houteishiki (Mugen)] Shinkai Seikan (Kantai Collection -KanColle-) [Digital]
(C70) [Neko Kinryouku (NekoNeko)] NekoNeko Otona Houteishiki