(SUPER13) [Aireal, Teruo Haruo (Fuka, Kanekiyo Miwa)] Kagai Jugyou - Extracurricular Lesson (Yu-Gi-Oh!)
Naisho no Wakana-san
[Studio Wallaby (Various)] Tron no Naisho (Mega Man Legends)
Mifune-san to Naisho no Sailor Fuku
Naisho no Sakuya-san
(C89) [conezu step!+Ziggurat (Suzuki Akoni)] JK Yome Sakura no Kagai Jugyou [Chinese] [無邪気漢化組]
[Usi] Otto ni Naisho de Ajimi Shite 1
(SUPER23) [Dogfes (sio)] Kagai Jugyou (Ansatsu Kyoushitsu)
Kareshi ni Naisho de 4 Aijin... Nacchaimashita. | Keep This A Secret From My Boyfriend 4 - I Became... A Mistress.
Anoko nya Naisho
Otona ni Naisho no Warui Koto
Kareshi ni Naisho de...
Naisho no Kojin Shidou Shinkyuu Hen
Oya ni Naisho no Iedex 5 - Futsukame Hen
[SAS] Kagai Jugyou ni Youkoso!(COMIC Penguin Club Sanzokuban 2011-12)
(C84) [ROMEO DASH (Kitto Shibaru)] Naisho desuyo, Reimu-san! (Touhou Project)
[Rakko] Papa ni wa Naisho! | Keep It A Secret From Daddy! (Murikuri) [English] [desudesu]
Oya ni Naisho no Umi no Iedex
(CINDERELLA FESTIV@L) [Aozora Shoujo (Shirane Taito)] Naisho no Gao Gao Ecchi (THE IDOLM@STER CINDERELLA GIRLS) [Chinese] [星野願漢化WEI嵌字]
(COMIC1☆8) [Atelier Lunette (Mikuni Atsuko)] Naisho Nano! -Haruhara-ke San Shimai Monogatari-
(C92) [Retasuya (Retasu)] Kaiboukan to Naisho no Asobi (Kantai Collection -KanColle-)
[Ookami Uo] Yuutousei | The Honor Student ([Ryuushutsu] JSJC Naisho no Jian) [English]
(Panzer Vor! 11) [Nazunaya Honpo (7zu7)] Erika no Naisho. (Girls und Panzer)
(C79) [Human High-light Film (Shiosaba)] Naisho no Ayanami (Neon Genesis Evangelion) [English] [CGrascal]
(C88) [PINK CHUCHU (Mikeou)] Naisho no Shintai Sokutei (Gochuumon wa Usagi desu ka?) [Chinese] [脸肿汉化组]
(C94) [Kitsuneya (Leafy)] Chibikko Eirei to Naisho no Okusuri Techou (Fate/Grand Order) [Chinese] [脸肿汉化组]
Oya ni Naisho de Oppai shite kureru Katei Kyoushi no Onee-san
Hoka no Dare ni mo Naisho da zo? | Keep This a Secret From Everyone Else
Youkoso Paisen ~AV Joyuu no Kagai Jugyou~ | Welcome graduate ~AV Actress's Extracurricular lesson~
[Ichinomiya Yuu] Naisho no Complex (COMIC Anthurium 036 2016-04) [Chinese] [黑条汉化]
[Konohana] Naisho no Jikan (COMIC Megastore 2009-04) [English] [AlphaYang]
Futari de Naisho no Ohanashi
[Tukimi Daifuku] Mama ni wa Naisho
(C72) [C@T Slash (Kahama Youko)] Naisho no Jikan (Kodomo no Jikan)
(C71) [Okosama Lunch (Nishinozawa Kaorisuke, Hirayan)] Okosama Lunch Kagai Jugyou 2+ Plus
Naisho no Kojin Shidou 2
(C78) [Titokara 2nd Branch (Manami Tatsuya)] Ookami-san to Naisho no Doku Ringo (Ookami-san to Shichinin no Nakama-tachi)
(Shotaket 11) [Studio Rakkyou (Various)] Tsubasa x4 no Naisho (Naisho no Yorimichi) [English]
Hanasaku Mori no Naisho no Hanashi.
Dejiko no Naisho-nyo
[Ookami Uo] (Ryuushutsu) JSJC Naisho no Jian [Chinese]
[Kitakata Kuniaki] Himitsu no Keijiban H na Onna no Naisho Banashi
[Vitamin Gohan (Hasegawa Keita)] Naisho no Sakuya-san | 不为人知的咲夜 (Touhou Project) [Chinese] [sismvg英渣汉化] [Digital]
Shiroki senkō howaitopansā ~ haiboku kagai jugyō ~
Erika no Naisho.
[Torajima-shi Kouhouka (Torajimaneko)] Builder to Fighter no Naisho Banashi (Gundam Build Fighters) [English] {Shotachan} [Digital]
(Senka no Toki) [Syupa! (makiron)] Naisho no Uchiban | 祕密的內番 (Touken Ranbu) [Chinese] [月下鹤吟汉化组]
Owaranai Kagai Jugyou
[MoonRevenge (Miyuma Subaru)] Futari no Naisho
(C92) [Tenrake Chaya (Ahru.)] Matsurinoyoru no Naisho (Kantai Collection -KanColle-)
(Magical Royale) [Kuromori-ya (Morii Fuzuki)] Onna Kishi no Kagai Katsudou (Mahou Shoujo Ikusei Keikaku)
Chika-chan ni mo Naisho no Himitsu 2
[Light Pink] Yes! Kagai Katsudou (Yes! Precure 5)
Mary ni wa Naisho desu!
[Kaiduka] Iede JK to Pet Seikatsu ~Kazoku ni Naisho de Dokodemo H~ Kanzenhan [Digital]
Kanojo wa Chou Yuumei Geinoujin... Soshite Boku ni Naisho de AV Joyuu Satomi-Satona Gojitsudan 3 | My Famous Girlfriend... Is An AV Pornstar Behind My Back: SatomixSatona The Sequel Ch. 3
[Tsukino Jyogi] Minato-sensei no Kagai Jugyou (COMIC HOTMiLK 2015-09) [Chinese] [瓜皮汉化]
Senpai ni wa Naisho ssu yo?
[SAIGA dou] Otto ni Naisho de Kozukuri Takuhai Service Oshiharai wa Teisou Hikikae
Naisho no Kangoane | 偷偷來的護理師姊姊
GIGANTIC DIVA
Yukikaze-sama to Naisho no Asobi
[Studio Wallaby] Dejiko no Naisho-nyo (Digi Charat)
[Titokara 2nd Branch (Manami Tatsuya)] Naisho no Kimochi Bangai Hen (Zero no Tsukaima)
Naisho nya?
(C72) [Super Flat Lolinitron (Focke Wolf)] Karada no Naisho. (Asatte no Houkou.)
[Shunjou Shuusuke] Naisho no Jouji | Secret Affair (Osaekirenai kono Kimochi) [English] {doujin-moe.us}
[Leafy] Mama ni Naisho no Hatsujouki [Digital]
Ikenai Koto wa Naisho de Suru Mono
(C88) [brilliant thunder (Yumeno Tanuki)] Oya ni Naisho no Iedex
[Itou Nanami] Naisho no Houkago (COMIC Potpourri Club 2014-07) [Chinese] [黑条汉化]
[AKIRA] Eve no Naisho Banashi 1
[SeriharaZ] Campus x Foot
(C71) [Kurage no Candume (Yoshino)] Naisho! It's a Night Show! (Simoun)
Gaman Dekinai Kagai Jugyou
[Minor Boy] Keiko Sensei no Kagai Jugyou - Keiko Sensei Series 1
Naisho no Love Mariage | 비밀의 결혼
Naisho no Hokenshitsu
[Nedaore (Ayane)] Onnanoko Naisho Space (Puella Magi Madoka Magica) [Digital]
(CiNDERELLA ☆ STAGE 6 STEP) [Rokata Aruki (Akino Komichi)] Naisho no Ohanashi o (THE IDOLM@STER CINDERELLA GIRLS)
(SC33) [Titokara 2nd Branch (Manami Tatsuya)] Naisho no Kimochi (Zero no Tsukaima)
[MaSBeYaAKT (MaSBe Akyto)] Petanko Ryou-chin ~Minna ni Naisho no Otoko no Ko Idol RYO-chan no Aruhi no Ohanashi (THE IDOLM@STER)
(C88) [Fetism (Tanaka Ginji)] Takao-san no Naisho! (Kantai Collection -KanColle-)
(C88) [Sweet Candle (Sakuraizumi Yuu)] Naisho no Asobi (THE iDOLM@STER CINDERELLA GIRLS)
[Katsurai Yoshiaki] Kyou-sei Kagai Shidou | After School Obedience Coaching (COMIC Megastore 2010-02) [English] {doujin-moe.us}
Kobato no Naisho
[SAIGA dou] Otto ni Naisho de Kozukuri Takuhai Service Oshiharai wa Teisou Hikikae [Chinese] [想吸大尾巴个人汉化]
(C94) [Aimaitei (Aimaitei Umami)] Futanari Osananajimi to Ore to Hajimete no Gyaku Anal Kagai Jugyou 丨扶她青梅竹馬和我第一次的反向小穴做愛課外授課 [Chinese] [沒有漢化]
[Ameyama Telegraph (Ameyama Denshin)] Rokujou Junko no Haisetsu Kagai Jugyou [Digital]
JK Yome Sakura no Kagai Jugyou
(C85) [Mama ni wa Naisho (Plasma Beach)] Hoshokukei Joshi (GOD EATER)
[Aimaitei (Aimaitei Umami)] Futanari Osananajimi to Ore to Hajimete no Gyaku Anal Kagai Jugyou [Digital]
(C62) [SimaSima System, Nagisawaya (Nagisawa You)] Sakura no Naisho Kawara Ban Sono 4 (Cardcaptor Sakura)
(C96) [Manmaru Hoppe (Yawaraka Midori)] Yuka-chan no Naisho | Yuka-chan's Secret [English] {Mistvern}
[Keno Yantarou] Hazukashii Kagai Jugyou | 害羞的課外授業 [Chinese]
Onii-chan to Naisho no Oshiri Lesson
Chika-chan ni mo Naisho no Himitsu
(C82) [MINT BLUE (MOYURU/n)] ORE×YOME 06 - Naisho no Azu Cat (K-ON!)
[Hanpera] Katei Kyoushi no Kagai Jugyou (Ane Chichi) [Chinese] [黑条汉化]
Otonari-san no Naisho na Enkou Seikatsu
On'na kishi no kagai katsudō (Mahou Shoujo Ikusei Keikaku
Enshoku Niku Sakura - Coquettish Flesh Cherry
Rika Sensei no Kagai Jugyou | Rika Sensei's Extracurricular Lesson
(C91) [Brilliant Thunder (Yumeno Tanuki)] Oya ni Naisho no Iedex - Fuyuyasumi no Toode Hen
(COMIC1☆5) [Mama ni wa Naisho (Purukogi Beach)] GIGANTIC DIVA (King of Fighers)
[Musashimaru] Touzen, Imouto ni wa Naisho de
Natori Sana -Naisho no Douga Satsuei-
[Babymaker (Beco)] Naisho no Kozukuri 2
Hikki ni wa "Naisho!" no Houshi Katsudou
(COMIC1☆7) [CARAMEL CRUNCH! (Rikatan)] Naisho no Houkago Idol (Love Live!)
Boku to Kanojo no Hikakuteki Naisho no Nichijou Chapter 2
[Dynamite moca] Naisho no Ecchi Gokko Ch. 1-2 [Digital]
[Yanagawa Rio] Naisho no Wonderland | Wonderland of Secrets (GoGo! Girls) [English] {5 a.m.}
Houkago no Naisho
(C89) [Jagabata (Oimo)] Naisho no Futarikiri (PriPara) [English] {/u/ scanlations}
Ore-tachi Futari no Naisho-goto!
(Futaba Gakuensai 9) [Sekai Saiko (Mesopotamian Civ)] Naisho no Tsuinteruzu
Jiiji ni wa Naisho ni Shite ne
[TTSY (Kurogane)] Shougatsu Gyouji Naisho no Oshiire Sex
(C88) [PINK CHUCHU (Mikeou)] Naisho no Shintai Sokutei (Gochuumon wa Usagi desu ka?)
Naisho no Gohoubi
Boku to Onii-chan no Naisho no Orusuban
Okaa-san no Naisho
Tenshi no Kagai Jugyou Ch. 4
(C93) [Zabuton Makura (Nakai)] Anoko ni Naisho no Uchiawase (THE IDOLM@STER CINDERELLA GIRLS) [English]
(Kouroumu 6) [04U (Misasagi Task)] Anoko nya Naisho (Touhou Project)
Kanojo ni Naisho de
Naisho no Ouma-san Gokko | Secret Horse Play {doujins.com}
(Sougetsusai 05) [Naisho No Usagi Koya (Tawawaringo)] Jaku Usagi Monogatari
[Garakuta Shoujo (Miito Shido)] Kanojo wa Chou Yuumei Geinoujin... Soshite Boku ni Naisho de AV Joyuu Satomi-Satona Gojitsudan 3
[Ponsuke] Naisho no Kaihou (COMIC LO 2017-12) [Chinese] [腥海社] [Digital]
(COMIC1☆11) [KURUBUSI-KAI (Dowarukofu)] Mikan no Naisho no Houkago (To LOVE-Ru Darkness) [English] [biribiri]
(C83) [Mama ni wa Naisho (Purukogi Beach)] Enshoku Niku Sakura - Coquettish Flesh Cherry (Dead or Alive)
Kare ni wa Naisho ~Sex Namahaishin~