[Maruta] Boku to Kanojo no Hikakuteki Naisho no Nichijou Conclusion (English)
[Root 12-hedron (Landolt Tamaki)] Zutto Naisho ni Shiteta kedo, Jitsu wa Watashi, Haeteru no. | I've always kept this a secret, but the truth is, I have one [English] [UsagiTrans] [Digital]
(C88) [brilliant thunder (Yumeno Tanuki)] Oya ni Naisho no Iedex | 瞞著父母的離家SEX [Chinese] [亂交派對套子裡的殘渣翻譯] [Incomplete]
(C59) [Chuuni+OUT OF SIGHT (Kim Chii)] Onee-chan to Naisho 01
[Usi] Otto ni Naisho de Ajimi Shite Ch. 1-11
[Horihone Saizou] Naisho-Yoo
[Yuzuponz (Kikira)] Inumimi Seikatsu ~Hatsujouki no Itoko Namahame Tokubetsu Jugyou~ [English] {JUSTICE} [Digital]
(C79) [Kirimochi Texture (Kyuu Yoyoyoyou)] Naisho no Milky Time (Tantei Opera Milky Holmes)
Bijutsu Jugyou Dessin Model
JK Yome Sakura no Kagai Jugyou
[FEI] Sensei's Secret Lesson Ch. 1-3 | Sensei no Himitsu Jugyou Ch. 1-3 [English] [Lazarus H]
(C90) [Raijinkai (Haruki Genia)] Naisho no Kagai Jugyou (NEW HORIZON) [English] {Hennojin}
[Kitakata Kuniaki] Himitsu no Keijiban H na Onna no Naisho Banashi
[Natsume Benkei] Nichijou-teki ni Okaa-san ni Dasu Seikatsu - Otou-san ni Naisho no Nakadashi Ecchi Hen
(C93) [Mama ni wa Naisho (Plasma Beach)] Miwaku no Muscle Pose (Dragon Quest XI)
(C82) [THE FLYERS (Naruse Mamoru)] Ako-chan to Naisho no XX + plus (Saki Achiga-hen)
[Anzaki Moral] Kanbyou Shite Ageru | Sinful Nursing (Hanjuku Yawaana Jugyou) [English] [ugliblawg]
[Nohri Isawa] Naisho no Kansatsu Nikki (Secret Observation Journal) [English] [Mistvern]
Chiron Sensei no Seikou Jugyou
(C81) [TIES (Takei Ooki)] Kobato no Naisho. (Boku wa Tomodachi ga Sukunai) [Decensored]
[ISOTONIX (Nixinamo:Lens)] Natsuki As You Like Naisho no Ura-Video
[Ookami Uo] Yuutousei | The Honor Student ([Ryuushutsu] JSJC Naisho no Jian) [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. 1-3 [English] {Doujins.com}
(COMIC1☆6) [MIX-ISM (Inui Sekihiko)] Naisho no ×××。 (Bakemonogatari)
[Ika Client] Girotin Konsoku Hoken no Jugyou
(SUPER24) [Rolling box (Kanaru Tabito, Shiina Akira)] Kyosuke ni wa Naisho (THE IDOLM@STER SideM)
(COMIC1☆11) [KURUBUSI-KAI (Dowarukofu)] Mikan no Naisho no Houkago (To LOVE-Ru Darkness)
[Pirates Patrol (Otokawa Kazuki)] Naisho no Omorashi [Digital]
[Ponsuke] Naisho no Kaihou (COMIC LO 2017-12) [Chinese] [柳葉個人漢化] [Digital]
[Mimimimi (Narita Riuku)] Ati-sensei no Hachimitsu Jugyou Sairoku-ban (Summon Night 3) [Digital]
[Takase Yuu] Naisho no Jiyuuchou
(CSP5) [popular plus (Plus)] Boku to Hideyoshi to Naisho no Yorimichi (Baka to Test to Shoukanjuu)
(C88) [Sweet Candle (Sakuraizumi Yuu)] Naisho no Asobi (THE iDOLM@STER CINDERELLA GIRLS) [Chinese] [脸肿汉化组]
[Mitarashi Kousei] Seikou Jugyou (teaching sex)
(C73) [Samurai Ikka (Kureyon)] Yomako Sensei no Yuuwaku Jugyou | Teacher Yomako's Temptation Teaching (Tengen Toppa Gurren Lagann) [English] [q91]
Kagai Jugyou | Extracurricular Activity
(C80) [milkberry (Kisaragi Miyu)] Minna ni wa Naisho da yo (Puella Magi Madoka Magica)
Keiko Sensei no Kagai Jugyou - Keiko Sensei Series 1
[FEI] Sensei no Himitsu Jugyou | Sensei's Secret Lesson Ch. 1-6 [English] [Lazarus H]
Tokubetsu Jugyou Shiyou! Kashima-chan!
(SC31) [P-Forest (Hozumi Takashi)] Otome no Naisho Tomoe-chan to Iroiro... (Mai-Otome)
[Ginto] Ure Niku Neburi Gakuenchou to Boku no Ero Hon Kagai Jugyou
Naisho no Kagai Jugyou Ouyou Hen
(C91) [Fujiya (Nectar)] Naisho na Shinomiya-san
[HONOYURARA (Mitsuhabotan)] Kagai Jugyou Netsu Shisen (Kill la Kill) [Digital]
[Kasuga, Shin] Hadakanbo Kyouiku - JK mo Oppai Marudashi!? Sukoyaka Zenra Jugyou 1 | Hadakanbo Education - Schoolgirls' Breasts are Exposed!? Naked Health Lesson 1 [English] [Decensored] [artfish]
(Sougetsusai 05) [Naisho No Usagi Koya (Tawawaringo)] Jaku Usagi Monogatari
[Tamagoro] Boku to Oneesan no Naisho (COMIC Penguin Club Sanzokuban 2014-07) [English] [vaasi]
(C86) [Mama ni wa Naisho (Plasma Beach)] Kinniku Chocolate (Samurai Spirits)
(C91) [milkberry (Kisaragi Miyu)] Houkago no Naisho
(CT5) [Transistor Baby (Hata)] Sensei to Himitsu no Kagai Jugyou (Summon Night 3)
[Irotsuki Sakari] Kanjiru Kagai Jugyou
[Iguchi Sentarou] Classmate to Ecchi Jugyou Ch. 1 [English] [Digital]
[Garakuta Shoujo (Miito Shido)] Kanojo wa Chou Yuumei Geinoujin... Soshite Boku ni Naisho de AV Joyuu Satomi-Satona Gojitsudan 1
Seiseki Up! Tokubetsu Kojin Jugyou no Himitsu
(C71) [Pyonpyororin (Akoko.)] Ano... Naisho ni shite kudasai ne? (Suzumiya Haruhi no Yuuutsu) [English]
Yume no Natsugai Jugyou
Youkoso Paisen ~AV Joyuu no Kagai Jugyou~
(C92) [megalodon (Mezashi Gohan)] Albion Gakuen Himitsu no Jugyou (Granblue Fantasy)
[FEI] Sensei no Himitsu Jugyou | Sensei's Secret Lesson Ch. 1-4 [English] [Lazarus H]
[Kitani Sai] Himitsu Jugyou
[Sankuro] Himitsu no Jugyou Sankan | Secret of the Classroom Visit (COMIC LO 2011-01) [English] [Mistvern]
[Kitani Sai] Shitsuraku Aroma | Lost Aroma (Himitsu Jugyou) [English] {Fated Circle}
[Garakuta Shoujo (Miito Shido)] Kanojo wa Chou Yuumei Geinoujin... Soshite Boku ni Naisho de AV Joyuu Satomi-Satona Gojitsudan 1 [Digital]
Gaman Dekinai Kagai Jugyou
[Fireball Products] Seki Sensei No Kagai Jisshuu
[Agata] Naisho no Kakurenbo (COMIC Megamilk Vol.18)
Mystery House 2 Densha Chikan-hen & Kyoushitsu Jugyou-hen zen 20P-ban
[Morishima Kon] Naisho No Gohoushi (COMIC Tenma 2016-04) [Chinese] [漢化組漢化組]
[Asahina Makoto] Naisho no Natsuyasumi Ch. 1-2
Tenshi no Kagai Jugyou Ch. 3
(C89) [Jagabata (Oimo)] Naisho no Futarikiri (PriPara) [English] {/u/ scanlations}
(Puniket 23) [Suitekiya (Suitekiya Yuumin)] Naisho no HONya-san (Watashi no Ouchi wa HONya-san)
(C71) [Okosama Lunch (Nishinozawa Kaorisuke, Hirayan)] Okosama Lunch Kagai Jugyou 2+ Plus