[Katsurai Yoshiaki] Amatsuka Gakuen no Kaikan Jugyou (COMIC X-EROS #37)
(C91) [Fujiya (Nectar)] Naisho na Shinomiya-san
(Shotaket 11) [Studio Rakkyou (Various)] Tsubasa x4 no Naisho (Naisho no Yorimichi)
[Tokunaga Poosaku] Himitsu no Kagai Jugyou
(Break Shot! 9) [Zawameki Jambo (Zawameki)] Naisho no Hanashi (Danganronpa)
[Minor Boy] Keiko Sensei no Kojin Jugyou - Keiko Sensei Series 2
[Koshou Shoushou] Kagai Jugyo ha Houkago ni
(SPARK8) [Yu-cho (Pal)] Otona niwa Naisho (Free!)
Mama ni Naisho Mama to Naisho
(SUPER22) [Kiiro Bird (Pappa)] Oyajidomo ni wa Naisho dazo (Magi: The Labyrinth of Magic)
[Aoji] Kagai Jugyou (Naruto)
Tobibako no Jugyou
(CR31) [Studio Wallaby (Various)] Rizell no Naisho (Rizelmine)
(C81) [TIES (Takei Ooki)] Kobato no Naisho. (Boku wa Tomodachi ga Sukunai)
(COMIC1☆6) [N2jirai (Nimu)] Tsukihi-chan ni wa Naisho de (Nisemonogatari)
Classmate to Ecchi Jugyou 4~6
[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. 1-2 [English] {Doujins.com}
[MaSBeYaAKT (MaSBe Akyto)] Petanko Ryou-chin ~Minna ni Naisho no Otoko no Ko Idol RYO-chan no Aruhi no Ohanashi (THE IDOLM@STER)
[Oshii Rei] Kougyaku Jugyou [Digital]
(C89) [EX35 (Kamaboko RED)] Minna ni naisho no setting! (Bakusou Kyoudai Let's and Go!!)
[Minor Boy] Keiko Sensei no Chijoku Jugyou
[Studio Wallaby (Various)] Sakura no Naisho (Cardcaptor Sakura)
(C85) [furuike (Sumiya)] Off no Kongou to Naisho no Ohanashi (Kantai Collection -KanColle-)
(C88) [PINK CHUCHU (Mikeou)] Naisho no Shintai Sokutei (Gochuumon wa Usagi desu ka?) [Chinese] [脸肿汉化组]
Chakui Shasei no Susume Sensei no Kagai Jugyou
[Mita Kurumi] Mama ni wa naisho ne? (COMIC Penguin Club 2015-08) [Chinese] [Drz翻訳]
(COMIC1☆11) [KURUBUSI-KAI (Dowarukofu)] Mikan no Naisho no Houkago (To LOVE-Ru Darkness)
Sakurako Sensei no Tokubetsu Jugyou
[Maruta] Boku to Kanojo no Hikakuteki Naisho no Nichijou Chapter 1 (English)
(SC5) [Studio Wallaby (Deep Purple '72, Kura Oh)] Doris no Naisho (D4 Princess)
[Nyoroman Shouji] Mucchimuchi Keiko Sensei no Chou Nikkan Dohentai Jugyou! "Muchimuchi Roshutsu Choukyou Aheahe Chigoku Hen" (Kekko Kamen)
[Amatarou] Futari de Jugyou wo Nukedashite ♡ | Sneaking out of Class Together [English] {YQII}
[Furuta kazuya] Jukujo no taiken otto niha naisho
[kedamono (Tori Hrami)] Naisho no Undoukai | 运动日的秘密 [Chinese] [本子社汉化] [Colorized] [Digital]
Paizurina sensei no kagai koshu♪
Sensei to Kozukuri LOVE Jugyou
[Keno Yantarou] Hazukashii Kagai Jugyou | 害羞的課外授業 [Chinese]
[Murasame Maru] Ninpara ~Botehara XXgakusei no Tokubetsu Jugyou~
Classmate to Ecchi Jugyou Ch. 6
(C91) [Fujiya (Nectar)] Naisho na Shinomiya-san | The Secretive Shinomiya-san [English] {Hennojin}
[MARUTA] Boku to Kanojo no Hikakuteki Naisho no Nichijou (Complete)
[Oyama Yasunaga] Kahanshin Jugyou - Teaching About the Lower Half of the Body
[Alde Hyde] Ottori Kyoushi no Nettori Jugyou (ANGEL Club 2012-04) [Chinese] [cqxl自己汉化] [Digital]
(C88) [THE FLYERS (Naruse Mamoru)] Maekawa-san to Naisho no XX (THE IDOLM@STER CINDERELLA GIRLS)
(C88) [PINK CHUCHU (Mikeou)] Naisho no Shintai Sokutei (Gochuumon wa Usagi desu ka?)
(C90) [SAZ (Onsoku Zekuu)] Kudelia Sensee no Seiteki Jugyou (Mobile Suit Gundam Tekketsu no Orphans)
[Okosama Lunch (Nishinozawa Kaorisuke, Hirayan)] Okosama Lunch Kagai Jugyou Light
[MARUTA] Boku to Kanojo no Hikakuteki Naisho no Nichijou [English] [CGrascal]
[Root 12-hedron (Landolt Tamaki)] Zutto Naisho ni Shiteta kedo, Jitsu wa Watashi, Haeteru no. [Digital]
[Garakuta Shoujo (Miito Shido)] Kanojo wa Chou Yuumei Geinoujin... Soshite Boku ni Naisho de AV Joyuu Satomi-Satona Gojitsudan 1 [Digital]
[Musenmai] Naisho (COMIC AUN 2017-01) [Chinese]
(C94) [Akausagi (Fukuyama Naoto)] Kagai Jugyou Sakuya Hen (Kagai Jugyou -Shiritsu Hakurei Joshi Gakuen-)
(COMIC1☆7) [Aroma Gaeru (Numahana)] Hamon Kyoushi no Setekina Jugyou | Sexual Lessons of the Ripple Teacher (JoJo's Bizarre Adventure) [English] {doujin-moe.us}
[Momonosuke] Shirai Sensei no Hoshuu Jugyou (Momoiro Otome Irony) [Chinese] [黑条汉化] [Digital]
(Geinoujin wa Card ga Inochi! 4) [Colomonyu (Eromame)] Naisho no Nail (Aikatsu!) [2nd Edition]
[Keno Yantarou] Hageshii Kagai Jugyou
[Pirates Patrol (Otokawa Kazuki)] Naisho no Omorashi [English] [Digital]
Zenra de Suiei no Jugyou!!
[Minamida Usuke] Dokidoki Hoshuu Jugyou (COMIC Megastore Alpha 2016-04) [Chinese] [黑条汉化]
(C90) [Supurabi (Haruharu Haruto)] Futari de Naisho no Ohanashi (Granblue Fantasy)
Hajimete no Jugyou Sankan
(HaruCC20) [Mikazuki Shokudou (Kurosawa Ayuki)] Aniki ni wa Naisho da yo? (Daiya no Ace)
(CINDERELLA FESTIV@L) [Aozora Shoujo (Shirane Taito)] Naisho no Gao Gao Ecchi (THE IDOLM@STER CINDERELLA GIRLS) [English]
[Fireball Products] Seki Sensei No Kagai Jisshuu Ver1.5
[Itou Nanami] Naisho no Houkago (COMIC Potpourri Club 2014-07) [Chinese] [黑条汉化]
(C93) [ParadiseGom (Gorgonzola)] Naisho no Ohime-sama | The Princess' Secret (Dragon Quest XI) [English] =TLL + mrwayne=
[Kitani Sai] Himitsu Jugyou
[Sada Ko-ji] Onnakyoushi Ryoujoku Jugyou Burn & Freeze
[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]
Rean Kyoukan no Tokubetsu Kagai Jugyou
(C87) [Jaku Shouji Musho Shokun (Futaba Yae)] Naisho no Hakuchi Shuuri (Kantai Collection -KanColle-)
[Hiyashi Asia (Agurecchi)] Lunasa Onee-chan no Naisho no Bansoukai (Touhou Project) [Digital]
(C73) [Samurai Ikka (Kureyon)] Yomako Sensei no Yuuwaku Jugyou | Teacher Yomako's Temptation Teaching (Tengen Toppa Gurren Lagann) [English] [q91]
[Torajima-shi Kouhouka (Torajimaneko)] Builder to Fighter no Naisho Banashi (Gundam Build Fighters) [Digital]
[Watanabe Wataru] Naisho ni Shite ne
[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]
(C94) [Service Heaven (Azukiko)] Kawakami Sensei to Futaba no Himitsu Kojin Jugyou (Persona 5)
[Kuronisiki (Takaharu)] Onee-sama-tachi niwa Naisho de Senkan ni Narimasu (Kantai Collection -KanColle-) [Chinese] [koolo個人漢化] [Digital]
[Usi] Otto ni Naisho de Ajimi Shite Ch. 1-11
Yume no Natsugai Jugyou
(C89) [EX35 (Kamaboko RED)] Minna ni Naisho no Setting! (Bakusou Kyoudai Let's & Go!!)
Girotin Konsoku Hoken no Jugyou
[Yuzu Ramune] Yankee Musume o Ecchi de Kousei!? ~Jugyou de Ijirare Shitagi ga Gusshori~ 2
[Ginto] Ure Niku Neburi Gakuenchou to Boku no Ero Hon Kagai Jugyou
Tenshi no Houkago Jugyou Chapter 10
[Pavington (Takahara Sea-Gull, Marukido Sado)] Narashite Naisho no Concerto
(SC36) [Lezmoe! (Oyu no Kaori)] Zettai Naisho! Himitsu no Otomari nano (Mahou Shoujo Lyrical Nanoha StrikerS)
[Gyuunyuu Rinda] Minami Sensei no Tadashii Seikyouiku Jugyou | 美波老師的正確的性教育授業 [Chinese]
[Ichinomiya Yuu] Naisho no Complex (COMIC Anthurium 036 2016-04) [Chinese] [黑条汉化]
(C90) [Death Para (Tamaki Kurou)] Kitakami-san to Ooicchi Naisho no Naisho (Kantai Collection -KanColle-)
[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~ [English] {Doujins.com}
[Kitakata Kuniaki] Himitsu no Keijiban H na Onna no Naisho Banashi
[Agata] Naisho no Kakurenbo (COMIC Megamilk Vol.18)
[Keno Yantarou] Tadashii Kagai Jugyou [Chinese]
[Kasuga, Shin] Hadakanbo Kyouiku - JK mo Oppai Marudashi!? Sukoyaka Zenra Jugyou 2 | Hadakanbo Education - Schoolgirls' Breasts are Exposed!? Naked Health Lesson 2 [English] [Decensored] [artfish]
[Studio Wallaby (Deep Purple '72)] Arashi no Naisho, Aiko no Himitsu (Gad Guard)
Yuutousei ni Hitsuyou na Jugyou
(COMIC1☆8) [Nipopo Crisis (Genka Ichien)] Tanoshii Koto o Naisho ni Shiyou. Kanzenban (Zettai Muteki Raijin-Oh)
[Mama ni wa Naisho (Plasma Beach)] Luscious Beef Cake PLATINUM (Tekken)
Tenshi no Houkago Jugyou Chapter 9
Minato-sensei no Kagai Jugyou
(C80) [Avion Village F (Fechi)] Kamishirasawa Keine no Dosukebe Kojin Jugyou (Touhou Project)
(C89) [conezu step!+Ziggurat (Suzuki Akoni)] JK Yome Sakura no Kagai Jugyou [English] [H-Konbini]
(C92) [Atelier Lunette (Mikuni Atsuko)] Naisho Nano! -Haruhara-ke Sanshimai Monogatari- 3
(Futaba Gakuensai 9) [Sekai Saiko (Mesopotamian Civ)] Naisho no Tsuinteruzu
Bijutsu Jugyou Dessin Model
[Princess Project. (Sentape)] Private Lesson ~Nagato Yuki no Kojin Jugyou~ (Suzumiya Haruhi no Yuuutsu) [Digital]
[SAIGA dou] Otto ni Naisho de Kozukuri Takuhai Service Oshiharai wa Teisou Hikikae
Yancha Bouzu Yoru no Kagai Jugyou
(C58) [Studio Wallaby (Fuu)] Reiko no Naisho! (Comic Party)
(COMIC1☆7) [Aroma Gaeru (Numahana)] Hamon Kyoushi no Setekina Jugyou (JoJo's Bizarre Adventure)
(C89) [brilliant thunder (Yumeno Tanuki)] Oya ni Naisho no Iedex - Toshikoshi-hen
(C88) [H-SQUAD (Guglielmo)] Zenra de Suiei no Jugyou!!
(C91) [conezu step!+Ziggurat (Suzuki Akoni)] JK Yome Sakura no Inokori Jugyou [English] [H-Konbini]
[Light Pink] Yes! Kagai Katsudou (Yes! Precure 5)
(SC30) [P-Forest (Hozumi Takashi)] Otome no Naisho Nina-chan to iro iro... (Mai Otome)
[win win] Inwai Jugyou
[Hanpera] Nakadashi Tsuyudaku Kyonyuu Jugyou | 膣射出汁溢出 巨乳授業 [Chinese]
[Pija] Kanojo no Naisho (COMIC Megastore Alpha 2015-11) [Chinese] [脸肿汉化组]
(SC32) [Tololinco (Tololi)] Markl to Sophie no Naisho no Ohanashi | Secret Story of Markl and Sophie (Howl's Moving Castle) [English] [Fated Circle]
[Murasame Maru] Ninpara ~Botehara XXgakusei no Tokubetsu Jugyou~ | Ninpara ~Preggo Elementary Schooler's Special Lession~ [English] [ATF]
Abunai Kojin Jugyou
(C81) [Sukapon-Do (Kagawa Tomonobu, Yano Takumi)] Zerogumi Kagai Jugyou (Final Fantasy Type-0)
[Noise] Tobibako no Jugyou (COMIC LO 2013-05 Vol.110) [English] [Facedesk]
[Rokuichi] Ririn-san no Naisho no Kao to Daiji na Oheya | Ririn-san's Secret Expression and Her Precious Room (COMIC HOTMILK 2018-07) [English] [Stupid Beast] [Digital]
(C91) [CHARAN PORAN (Nekono Matatabi)] Naisho no Rehearsal (THE IDOLM@STER CINDERELLA GIRLS) [English]
[Iizuki Tasuku] Omoi de Ippai Ni Nin no Goudou jugyou?
(Shotaket 11) [Studio Rakkyou (Various)] Tsubasa x4 no Naisho (Naisho no Yorimichi) [English]
[Garakuta Shoujo (Miito Shido)] Kanojo wa Chou Yuumei Geinoujin... Soshite Boku ni Naisho de AV Joyuu Satomi-Satona Gojitsudan 2
Zenra de Suiei no Jugyou!! | Naked Swimming Class!! =LWB=
(SUPER23) [Dogfes (sio)] Kagai Jugyou (Ansatsu Kyoushitsu)
Amatsuka Gakuen no Kaikan Jugyou
[Studio Wallaby (Various)] VITAMIN-B5 1/3 Ruri Ruri Naisho no Gakuen Nikki (Kidou Senkan Nadesico)
[Ohigetan] Chikan Gakushuu Shidou Youryou ~Shou 6 Gyaku Chikan Kagai Jugyou Hen~ (COMIC LO 2016-08) [English] [Striborg]
[DL Mate] Saimin Jugyou
[SAIGA dou] Otto ni Naisho de Kozukuri Takuhai Service Oshiharai wa Teisou Hikikae [Chinese] [想吸大尾巴个人汉化]
[Mama ni wa Naisho (Plasma Beach)] Hihou Caligulation (Bakemonogatari)
(COMIC1☆7) [Bakunyu Fullnerson (Kokuriu)] Naisho no Oshigoto (Bakemonogatari) [Chinese] [黑条汉化]
[Nedaore (Ayane)] Onnanoko Naisho Space (Puella Magi Madoka Magica) [Digital]