(C87) [Kuronisiki (Takaharu)] Onee-sama-tachi niwa Naisho de Senkan ni Narimasu (Kantai Collection -KanColle-)
(C83) [CIrcle Ohigetan (Ohigetan)] Ohigebon-35 Classmate Ochinchin Jugyou Sankan [English] {Forbidden+Ranzu}
Houkago no Kojin Jugyou
(C73)[Alpha to Yukaina Nakamatachi] Naisho no Trap (Quiz Magic Academy)
Ninshin Inokori Jugyou
[Garakuta Shoujo (Miito Shido)] Kanojo wa Chou Yuumei Geinoujin... Soshite Boku ni Naisho de AV Joyuu Satomi-Satona Gojitsudan 3
(CR31) [Studio Wallaby (Various)] Rizell no Naisho (Rizelmine)
[Vitamin Gohan (Hasegawa Keita)] Naisho no Sakuya-san (Touhou Project) [Digital]
(C78) [apricot (Anji, Kuroo)] Omote to Ura no Himitsu to Naisho. (Amagami) [English] [magiclamp]
(C79) [Human High-light Film (Shiosaba)] Naisho no Ayanami (Neon Genesis Evangelion)
(Houraigekisen! Yo-i! 14Senme) [Testa Kitchen (Testa)] Onee-sama-tachi ni wa Naisho! (Kantai Collection -KanColle-)
[Goban] Iinchou no Kagai Jugyou | Class President's Extracurricular Lesson (Comic Megastore H 2012-05) [English] {numberkawshin} [Digital]
Naisho no Kagai Jugyou Ouyou Hen
Tenshi no Houkago Jugyou Chapter 7
[Natsuyasumi] Kagai Jugyou (Tamako Market)
Musuko no Tameni Tannin to SEX… Jugyou Sankan de Ikasenaide!
[Majo Saiban (Mion_orz)] Naisho no Omajinai [Digital]
[Human High-Light Film (Nise Tsuruta Hirohisa)] Honey no Naisho (Cutey Honey)
(C70) [ENERGYA (Russia no Dassouhei)] Asahina Mikuru-sensei no Tokubetsu Jugyou (Suzumiya Haruhi no Yuuutsu)
Rize Sensei to Himitsu no Jugyou
(C91) [conezu step!+Ziggurat (Suzuki Akoni)] JK Yome Sakura no Inokori Jugyou [Chinese] [無邪気漢化組]
[Keno Yantarou] Hageshii Kagai Jugyou
(C86) [Go-Go-Merry-Go-Round (Kasai Ema)] Naisho no Natsuyasumi. (Neon Genesis Evangelion) [English] [CGrascal]
(Kouroumu 6) [04U (Misasagi Task)] Anoko nya Naisho (Touhou Project)
(C78) [Studio Wallaby (Haruhonya)] Onee-chan Sensei Zenbu to Hoshuu Jugyou
(C88) [H-SQUAD (Guglielmo)] Zenra de Suiei no Jugyou!! | Naked Swimming Class!! [English] =LWB= [Colorized] [Decensored]
[Maruta] Boku to Kanojo no Hikakuteki Naisho no Nichijou Conclusion (English)
[MaSBeYaAKT (MaSBe Akyto)] Petanko Ryou-chin ~Minna ni Naisho no Otoko no Ko Idol RYO-chan no Aruhi no Ohanashi (THE IDOLM@STER)
[Nyoroman SHouji] Mucchimuchi Keiko Sensei no Chou Nikkan Dohentai Jugyou! "Kutsujoku no Kuro Mask Hentai Dorei Kamen Kanochi Hen" (Kekko Kamen)
(COMIC1☆5) [Mama ni wa Naisho (Purukogi Beach)] GIGANTIC DIVA (King of Fighers)
[Kitani Sai] Shitsuraku Aroma | Lost Aroma (Himitsu Jugyou) [English] {Fated Circle}
(Panzer Vor! 11) [Nazunaya Honpo (7zu7)] Erika no Naisho. (Girls und Panzer)
[Leafy] Mama ni Naisho no Hatsujouki
(COMIC1☆7) [Aroma Gaeru (Numahana)] Hamon Kyoushi no Setekina Jugyou (JoJo's Bizarre Adventure)
[Maruta] Boku to Kanojo no Hikakuteki Naisho no Nichijou Chapter 2 (English)
[Anthology] Megane Loli Choukyou Jugyou!! ~Otonashii Megane Lolikko ni Muriyari Dekachin Sounyuu~ | The Loli In Glasses' Training Lesson!! ~Force Fucking a Timid Glasses Wearing Loli With My Big Cock~ Ch. 1-4 [English] {Doujins.com}
[GOD Ryokutya (Bu-chan)] Papa ni wa Naisho yo? | Don't Tell Dad OK! (Brave Beats) [English] [Digital]
(C87) [NextPreview (MIA)] Sugoku ViVid na Seikyouiku Jugyou (Mahou Shoujo Lyrical Nanoha)
(C88) [nothingfades (Amane Nekoko)] Naisho no Hajimete Kouhen (PriPara)
Bijutsu Jugyou Dessin Model
(C93) [ParadiseGom (Gorgonzola)] Naisho no Ohime-sama (Dragon Quest XI) [Chinese] [最愛大屁屁x漢化組漢化組]
(C93) [Tatsumaki Koutei (Takei Tsukasa)] Mifune-san to 3-kai Ecchi Shinai to Derarenai Heya de Naisho no (THE IDOLM@STER CINDERELLA GIRLS)
(SC32) [Tololinco (Tololi)] Markl to Sophie no Naisho no Ohanashi | Secret Story of Markl and Sophie (Howl's Moving Castle) [English] [Fated Circle]
(C72) [MURDERHOUSE (Workaholic)] Boku to Mama no Naisho (Keroro Gunsou)
Tenshi no Kagai Jugyou Ch. 9
Ikinari Yashuu Kyouju An An Jugyou
[Boss Chin (Esecool)] Naisho no Ota x Bitch (COMIC Shingeki 2012-10)
(C89) [EX35 (Kamaboko RED)] Minna ni Naisho no Setting! (Bakusou Kyoudai Let's & Go!!)
(COMIC1☆8) [Atelier Lunette (Mikuni Atsuko)] Naisho Nano! -Haruhara-ke San Shimai Monogatari- [English]
[Unno Hotaru, Natsumi Chiharu, Yoshizawa Kei, Otohiko] Himitsu no Renai Jugyou 45
Inkou Kyoushi Dakkou Kakugo no Kakuchou Jugyou
[Anzaki Moral] Hanjuku Yawaana Jugyou - Soft-Boiled, so Sweet Hole Lesson.
[Hirose Miho] Himitsu no Kagai Jugyou
(C78) [apricot (Anji, Kuroo)] Omote to Ura no Himitsu to Naisho. (Amagami) [English]
[Asai Kikaku (Satou Masa)] Suki Suki! Bokura no Mucchiri Ona-Hole Sensei! Zenryoku Nakadashi Kojin Jugyou [Digital]
(C89) [666PROTECT (Jingrock)] Tenkousei JK Elf -Houkago Choukyou Jugyou- | High School Elven Transfer Student -After School Sex Training Lessons- [English] [Tremalkinger]
[Koutarou] Ritsuko-Sensei no Kojin Jugyou | Big Breasts Teacher, Children's Virginity Hunting Expert. (COMIC Bazooka 2011-12) [English]
[Jun&Yuri (Yuriko)] Tokubetsu Jugyou Shiyou! Kashima-chan! (Kantai Collection -KanColle-)
(CCTokyo132) [Kitei (Naoki)] Naisho Banashi (Kuroko no Basuke)
(Gakuen Trial 1.5 Kagai Jugyou) [ZCC (Zakiko)] Hi ga Kurete (Super Danganronpa 2) [English]
[Rivajima (Yajima Index)] Isuzu no Naisho Banashi (Amagi Brilliant Park) [Digital]
[Musashimaru] Touzen Imouto ni wa Naisho de | Keep It A Secret From My Sister Of Course [English]
Rean Kyoukan no Tokubetsu Kagai Jugyou
[Anthology] Megane Loli Choukyou Jugyou!! ~Otonashii Megane Lolikko ni Muriyari Dekachin Sounyuu~ | The Loli In Glasses' Training Lesson!! ~Force Fucking a Timid Glasses Wearing Loli With My Big Cock~ Ch. 1-3 [English] {Doujins.com}
Glenn Sensei no Rokudenashi Kagai Jugyou
(C81) [TIES (Takei Ooki)] Kobato no Naisho. (Boku wa Tomodachi ga Sukunai) [Decensored]
[Fireball Products] Seki Sensei No Kagai Jisshuu
(C71) [Ohtado (Oota Takeshi)] Naisho da yo! Mahou no Club Katsudou (Sasami Magical Girls Club)
(CT5) [Transistor Baby (Hata)] Sensei to Himitsu no Kagai Jugyou (Summon Night 3)
[Koshou Shoushou] Kagai Jugyo ha Houkago ni
(CR31) [Studio Wallaby (Deep Purple '72)] Su no Naisho!! -The secret of Su- (Vampiyan Kids)
[Usi] Otto ni Naisho de Ajimi Shite Ch. 1-9
(C88) [Akuten Soushin (Kokutou Nikke)] Tenryuu Onee-chan to Naisho no Yasen Enshuu!! (Kantai Collection -KanColle-) [Chinese] [BW个人汉化]
[Torajima-shi Kouhouka (Torajimaneko)] Builder to Fighter no Naisho Banashi (Gundam Build Fighters) [English] {Shotachan} [Digital]
Zenra de Suiei no Jugyou!! | Naked Swimming Class!! =LWB=
(Shota Scratch 25) [Yabure Kabure (Agemon)] Ogibo-san niwa Naisho desu. (Fullmetal Alchemist) [English] {Shotachan}
Kagai Jugyou Sakuya Hen
[Babymaker (Beco)] Naisho no Kozukuri
Kore mo Jugyou no Ikkan desu 2
[FEI] Sensei's Secret Lesson Ch. 1-2 | Sensei no Himitsu Jugyou Ch. 1-2 [English] [Lazarus H]
(C90) [Upagoya (Endori)] Senpai ni wa Naisho ssu yo? (Granblue Fantasy)
(C85) [Majimadou (Matou)] Enoshima Sensei no Chou Zetsubouteki Zecchou Jugyou (Danganronpa)
[Leafy] Mama ni Naisho no Hatsujouki [Digital]
(C90) [conezu step!+Ziggurat (Suzuki Akoni)] JK Yome Sakura no Yagai Jugyou
[Usi] Otto ni Naisho de Ajimi Shite Ch. 1-11
[Abe Inori] Ninshin Inokori Jugyou (ANGEL Club 2016-09) [English] [xinsu] [Digital]
Keiko Sensei no Chijoku Jugyou - Keiko Sensei Series 4
Secret lesson - Himitsu Jugyou
(COMIC1☆8) [Atelier Lunette (Mikuni Atsuko)] Naisho Nano! -Haruhara-ke San Shimai Monogatari- | It's a Secret! [English] [DKN117 & laguiole]
Izayoi Sakuya Sensei no Dosukebe Koukai Jugyou in Terakoya
[Ika Client] Girotin Konsoku Hoken no Jugyou
Keiko Sensei no Chijoku Jugyou
[Nekomaru Rentarou] Naisho no Omajinai (Puni Pedo!!) [Chinese] [我是肛♂蛋!不是 融⚥合!] [Digital]
(C57) [Studio Wallaby (Kokuden Kadotake, Shijuukara, Hontai Bai)] Shinobu no Naisho Love Hina Books (Love Hina)
[Light Pink] Yes! Kagai Katsudou (Yes! Precure 5)
(C90) [H-SQUAD (Guglielmo)] Hokentaiiku Jisshuu Jugyou ~Onnanoko no Karada no Shikumi Hen~ | Health and Physical Education Practice Lesson ~Girls' Anatomy~ [English]
(C92) [Macaron*Sketch (Yukatama)] Naisho no Cappuccino (Gochuumon wa Usagi desu ka?)
[Unknown (Unknown)] Taiiku Kyoushi 2 ~Bokura no Kagai Jugyou~
Kichiku-sensei no Kagai Jugyou
[Seki Sabato (Tsukuru)] Kyou mo Mata Katei Kyoushi ga Kite Kyousei Mesu Ochi Saimin Jugyou o Suru Hi [English] [Otokonoko Scans] [Digital]
[Tsukino Jyogi] Minato-sensei no Kagai Jugyou (COMIC HOTMiLK 2015-09) [Chinese] [瓜皮汉化]
Toron no Naisho (Tron's Secret) (Megaman)
[Dorachefu] Muchimuchi Kanojo no NTR Hoshuu Jugyou | NTR – Voluptuous Girlfriend's Supplementary Lesson (ANGEL Club 2018-07) [English] [seindryu] [Digital]
(C86) [Aienkien (Aito Matoko)] Mahoukakoukou no Kagai Jugyou (Mahoukakoukou no Rettousei)
Naisho no Kagai Jugyou
[Pin-13 (Juusangatsu)] Futari no Naisho (Kizuato) [Digital]
(COMIC1☆9) [Atelier Lunette (Mikuni Atsuko)] Naisho Nano! -Haruhara-ke Sanshimai Monogatari- 2
[Marneko] Onnanoko Supple ~Seitenkan Shite Hoken no Jugyou~ | 女孩子補給品 性轉換之後保健的授業 [Chinese]
Tsuya Ane ~Onee-san no Micchaku Jugyou~
[Irotsuki Sakari] Kanjiru Kagai Jugyou
(C88) [Decoppachi (Hidiri Rei)] Naisho no IV Satsuei-kai (THE IDOLM@STER MILLION LIVE!)
(C93) [ParadiseGom (Gorgonzola)] Naisho no Ohime-sama (Dragon Quest XI)
[TIES (Takei Ooki)] Mahou Shoujo no Naisho no Oshigoto (Puella Magi Madoka Magica)
[kuma-puro (Shouji Ayumu)] Raku Pera vol.8 Jugyou sankan (Various)
[Shinokage] Taiiku no Inokori Jugyou
[sho-tan] Taiiku no Jugyou
[Gekkou Tei (Seres Ryu)] Chiron Sensei no Seikou Jugyou (Fate/Grand Order) [Digital]
[Marneko] Onnanoko Supple ~Seitenkan Shite Hoken no Jugyou~ [Digital]
(C92) [666PROTECT (Jingrock)] Tenkousei JK Elf 3 -Houkago Yagai Jugyou- | High School Elven Transfer Student -After School Outdoor Lessons- [English] [Tremalkinger]
(C94) [Doku Tonkotsu Niku Dorei (Tanohito)] Chika-chan ni mo Naisho no Himitsu 2 (Love Live! Sunshine!!)
[Futaba Yae] Sabotte Hamatte Hoshuu Jugyou | Skip the Extra Class and Fuck Instead (COMIC Shingeki 2019-01) [English] [desudesu] [Digital]
Yomako-Sensei no Tokubetsu Jugyou
Kawakami Sensei to Futaba no Himitsu Kojin Jugyou | Una lección privada y secreta con Futaba y Kawakami-sensei
[Kitani Sai] Himitsu Jugyou
(COMIC1☆11) [KURUBUSI-KAI (Dowarukofu)] Mikan no Naisho no Houkago (To LOVE-Ru Darkness)
Tenshi no Houkago Jugyou Chapter 2
[Inomoto Rikako] Naisho no Onnanoko
Kitakami-san to Ooicchi Naisho no Naisho
Mizuho no Ecchi na Hoshuu Jugyou
Kyou-sei Kagai Shidou
[Dai 25 Hohei Shidan] ABC wa Ikenai Jugyou!
[Motika] Naisho no Sakunyuu | Milking In Secret (ANGEL Club 2014-01) [English] [vaasi]
Tenshi no Kagai Jugyou Ch. 4
Himitsu no Kagai Jugyou
(C90) [Supurabi (Haruharu Haruto)] Futari de Naisho no Ohanashi (Granblue Fantasy)
Enoshima Sensei no Chou Zetsubouteki Zecchou Jugyou {Less Censored Version}
(CINDERELLA FESTIV@L) [Aozora Shoujo (Shirane Taito)] Naisho no Gao Gao Ecchi (THE IDOLM@STER CINDERELLA GIRLS) [Chinese] [星野願個人漢化]
[Keno Yantarou] Hazukashii Kagai Jugyou | 害羞的課外授業 [Chinese]
[Sasahara Yuuki] Naisho no Happyoukai. - A Secret Recital
Tanoshii Kagai Jugyou | 즐거운 과외수업
[Jackpot 64 (HAN)] Alicia-mama to Naisho Ecchi Suru Hon (Granblue Fantasy) [Digital]
(C91) [Fujiya (Nectar)] Naisho na Shinomiya-san | 四宮同學的秘密 [Chinese] [夢之行蹤漢化組]
[Aimaitei (Aimaitei Umami)] Futanari Osananajimi to Ore to Hajimete no Gyaku Anal Kagai Jugyou | Me and My Futanari Childhood Friend's First Extracurricular Lesson in Reverse Anal [English] [JasmineTea] [Digital]
Kagai Lesson
[BOSS Chin] Naisho no Ota x Bitch (COMIC Shingeki 2012-10) [English] [desudesu] [Digital]
[ChildBox (Various)] Naisho no Asobi (Ojamajo Doremi)