Natsu x Umi = Kiken no Houteishiki
Sokuochi Yarichin Yankee | 一秒沦陷 玩咖♂不良 Ch. 1
Reisei no Houteishiki
(Jigoku Tokubetsu Kaigi 2) [Gotsugousyugi! (Nice! masamune)] Yasashisa Nearly Equal (Hoozuki no Reitetsu)
[Hiyoshi Hana] Kare to Imouto no Houteishiki (COMIC Megastore 2012-08)
[Miharu] Natsu no Nokoriga (COMIC Masyo 2006-11) [Chinese]
Kannou no Houteishiki (decensored)
Yasashisa no Uragawa | Behind the Kindness
[Fumizuki Kou] Koi suru Houteishiki
Yasashisa Nearly Equal
[Ecologist (moro)] Sonoyasashisaha. Mawatanoyouni Yawarakaku [Digital]
[Hiyoshi Hana] Neko to Watashi no Houteishiki | The Equation of the Cat and Me (COMIC Megastore 2012-02) [English] [The Lusty Lady Project]
[Azuki Kurenai] Yoru no Houteishiki 1 | Equation of the Night 1 [English] [Hentai-Enishi] [Decensored]
[ITOYOKO] Kichiku Houteishiki - Equation of brutal person
[Tonami Muka] Yasashisa no Seifuku
[Hiyoshi Hana] Chigiri to Musubi no Houteishiki | 契與結的方程式 [Chinese] [Digital]
[Azuki Kurenai] [Full Color seijin ban] Midara no Houteishiki - The Equation of the Immoral Kanzenban
Sprechchor to Houteishiki | Chorus and Formula
[Anthology] Kimusume Kanojo no Hatsujou Houteishiki [Digital]
[Momonga Club (Hayashibara Hikari)] Shoujo no Houteishiki - Girls of Equation [English] [SaHa] [Digital]
[Yuiga Naoha] 4P Houteishiki (COMIC P Flirt Vol.10 2011-04)
[Momonga Club (Hayashibara Hikari)] Shoujo no Houteishiki - Girls of Equation [Digital]
(C77) [Chidorinu] Boku to Kanojo no Houteishiki (Love Plus)
[Gentsuki] Yasashiisa no Houteishiki - Tender equation (COMIC BAVEL 2017-08) [Chinese] [揮淚錦馬超漢化] [Digital]
(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]
Doutei ga Cosplay Fuuzoku Itta Hanashi
[88scones (Sakaki Tsui)] Ayaki-kun to Houteishiki [English] {Shotachan}
Kimusume Kanojo no Hatsujou Houteishiki
[Azuki Kurenai] Midara no Houteishiki - The equation of the Immoral Ch. 9 [English] [SaHa]
(Puniket 22) [Web Knight (Knight Satoshi)] Silverstar (Touhou Project)
Sono Yasashisa ni Dokusarete | 被那份溫柔所愛
Neji to Nejiana no Houteishiki
[St. Rio (Kitty)] Love Dashi 7 (Love Hina)
Atatame no houteishiki
Chigiri to Musubi no Houteishiki | 契與結的方程式
[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]
Yasashisa no Uragawa
Yasashisa no Su
[Aura Seiji] Tanpopo Houteishiki
[Sena Youtarou] Kannou no Christmas Eve (Kannou no Houteishiki) [English] [Team Koinaka]
[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]
(C59) [Tomoyosama (Kayama Akihiro, Ozawa Hiroe)] Tomoyo No Yasashii Houteishiki (Cardcaptor Sakura)
ユカリニッキ DL
[Azuki Kurenai] Yoru no Houteishiki 1 | Equation of the Night 1
Eien no Houteishiki - Eternal Equation Chapter: 1
[Hiyoshi Hana] Kare to Imouto no Houteishiki | The Equation of Him and His Little Sister (COMIC Megastore 2012-08) [English] [The Lusty Lady Project]
[Shiwasu no Okina] Haruyokoi [English] [desudesu]
[Tekkamaki (Tetsuyama Kaya)] Nandemo Yasashiku Ukeirete Kureru Imouto [English] [frogstat] [Digital]
(C70) [Neko Kinryouku (NekoNeko)] NekoNeko Otona Houteishiki
[Azuki Kurenai] Midara no Houteishiki - The equation of the Immoral Ch. 1-2 [English] [hen-toy]
[Dendou Castella] Kotowarenai-ko-chan ga Umi no Ie Massage o Ukeru Hanashi
Rina-chan Renai Houteishiki
Sono Yasashisa ni Dokusarete
Yasashisa de Afureru Youni
[Kichiku na Eta] Kabejiri-chan
Madder red
Kirei na Onna to H no Houteishiki
[Carn] natsu×umi=Kiken no Houteishiki (Shinzui SUMMER Ver. Vol. 2) [Decensored]
Midara no Houteishiki
[Sena Youtarou] Kannou no Hirusagari | A Sensual Early Afternoon (Kannou no Houteishiki) [English] [QBtranslations]
中学生妻 雪菜 偽とか
Honey Candy no Hanbun wa Yasashisa de Dekiteiru
[Bousou Tenshi-UPsideDOWN (Sakatani Shinnosuke)] Koi no Renritsu Houteishiki (Yu-Gi-Oh! GX)
Koi no Riron Ai no Houteishiki
Aoharu Houteishiki "Onegai... Shite Hoshii no... Mou Torotoro dayo?" 1
[Sanbun Kyoden] Kindan no Houteishiki
[Hiyoshi Hana] Youma to Tsuya no Houteishiki (COMIC X-EROS#17) [Chinese]
(C87) [Mugen Houteishiki (Mutsu Minato)] MOSI×MOSI (Kantai Collection -KanColle-)
(C83) [Cannabis (Shimaji)] Doukyuusei no Ouchi no Jouji [English] [mysterymeat3]
(C74) [Momonga Club (Hayashibara Hikari)] Shoujo no Houteishiki - Girls of Equation
Sono Yasashisa ni Dokusarete | I Was Enchanted By Your Kindness
[Mugen Houteishiki (Mugen)] Shinkai Seikan (Kantai Collection -KanColle-) [Digital]
[Kazakami Shun] Active Renai Houteishiki Official Visual Book
(C93) [Mugen Houteishiki (Mutsu Minato)] Chaldea Sakusei Nisshi (Fate/Grand Order)
Homestay ~Hatsujou Sex~ | 홈스테이 ~발정 섹스~
[Utsusumi Onsen (Utsusumi Kio)] Sono Yasashisa ni Dokusarete (Blue Archive) [Digital]
[Sena Youtarou] Kannou no Houteishiki