[Motsu Aki] Kangaroo Oyako wa Hatsujouki (2D Comic Magazine Monster Musume ni Okasaretai! Vol. 2) [English] [constantly] [Digital]
[Jingrock] in Season (Shishunki wa Hatsujouki.) [English] [Phantom]
[Horihone Saizou] Naisho-Yoo
(C62) [Studio Wallaby (Deep Purple '72)] Naisho no Azumanga (Azumanga Daioh)
Hatsujouki no Pierrot
Hajimete no Hatsujouki Ch. 1-5
(C71) [Yuuha Onnakage (Hirota Masatane)] Hatsujouki (The Melancholy of Haruhi Suzumiya)
Kyaru wa Hatsujouki
(Geinoujin wa Card ga Inochi! 4) [Colomonyu (Eromame)] Naisho no Nail (Aikatsu!) [2nd Edition]
Hatsujouki Caenis ga Shota Guda o Gyaku Rape shichau Manga | A Book in Which Horny Caenis Reverse Raped a Shota Guda
[blue killer (Doku Denpa)] Naisho no Yodare Sex [Digital]
(C90) [Raijinkai (Haruki Genia)] Naisho no Kagai Jugyou (NEW HORIZON) [Chinese] [CE家族社]
(SC36) [Blood+Blood (Jakuwa)] Hatsujouki ni Douzoku Nanka ni Attari Suru kara... (Kaibutsu Oujo)
Papa ni wa Naisho yo? | Don't Tell Dad OK!
Saotome Hatsujouki
[MIRAGE CAT (Suika Soda)] Naisho Banashi Vol. 1-2 (Gintama) [Digital]
[Nohri Isawa] Naisho no Kansatsu Nikki (Secret Observation Journal) [English] [Mistvern]
Mazoku Hime Fleur no Hatsujouki
(C93) [Gossipgothic (Shishiji)] Kurashiki-sensei wa Hatsujouki Soushuuhen FINAL | Kurashiki Sensei's Mating Season Final Ch. 1 (Fujiyama-san wa Shishunki) [English] {Doujins.com} [Incomplete]
[Studio Claim] Havayama niwa Naisho... (Urusei Yatsura)
(C76) [Sorairo March (Narusawa Sora)] Inumimi Oujo no, Wafu Wafu Hatsujouki. (Dragon Quest II: Akuryo no Kamigami)
(COMIC1☆8) [TriaL3 (Various)] Naisho no Imouto Ecchi
[Garakuta Shoujo (Miito Shido)] Kanojo wa Chou Yuumei Geinoujin... Soshite Boku ni Naisho de AV Joyuu Satomi-Satona Gojitsudan 1
(HaruCC20) [Mikazuki Shokudou (Kurosawa Ayuki)] Aniki ni wa Naisho da yo? (Daiya no Ace)
(Umi Yukaba 6) [Can Do Now! (Minarai Zouhyou)] Hatsujouki Tama-chan to! (Kantai Collection -KanColle-)
[Vitamin Gohan (Hasegawa Keita)] Naisho no Sakuya-san | 不为人知的咲夜 (Touhou Project) [Chinese] [sismvg英渣汉化] [Digital]
[Hasemi_box (Hasemi Ryo)] Futari to Shota no Naisho Graffiti (Koufuku Graffiti) [Chinese] [靴下漢化組] [Digital]
[Sakeitiba (Samon Shiu)] Hatsujouki de IQ3 no Juujin ni Osoware Ecchi
(C90) [Dragon Kitchen (Sasorigatame)] Rem-rin to Naisho no Oshigoto (Re:Zero kara Hajimeru Isekai Seikatsu) [Chinese] [空気系☆漢化]
(C72) [SimaSima System (Nagisawa You)] Naisho no Hokentaiiku (Cardcaptor Sakura)
(C94) [Kaiteinnu (Rajunnu)] Mary ni wa Naisho desu! (Fate/Grand Order)
[Higashino Mikan] Kareshi ni Naisho de ❤ | Behind My Boyfriend's Back ❤ (COMIC Koh Vol. 3) [English] [sureok1]
(C92) [Atelier Lunette (Mikuni Atsuko)] Naisho Nano! -Haruhara-ke Sanshimai Monogatari- 3
(C55) [Studio Wallaby (Deep Purple '72, Takana Yu-ki, Niiruma Kenji)] Iincho no Naisho (To Heart)
[Sasahara Yuuki] Naisho no Happyoukai. - A Secret Recital [Digital]
Papa ni wa Naisho yo?
[Low] Hajimete no Hatsujouki Ch. 1 [English] [MrBubbles]
Hikki ni wa "Naisho!" no Houshi Katsudou
Kurashiki-sensei wa Hatsujouki Soushuuhen FINAL | Kurashiki Sensei's Mating Season Final Ch. 1
[Horihone Saizou] Naisho [ENG]
Momiji Onee-chan wa Hatsujouki!!
You-chan to Elune no Hatsujouki
(Zenkuu no Hasha 5) [momoirohoppe (Rei)] Djeeta-chan wa Hatsujouki | Djeeta-chan Is in Heat (Granblue Fantasy) [English] [Aoitenshi]
(CCTokyo132) [Kitei (Naoki)] Naisho Banashi (Kuroko no Basuke) [English]
Hatsujouki no Ran-sama to Sugosu Mikkakan | Spending 3 Days Alone With Ran, During Mating Season
Hatsujouki no Nyan Koishi
(C89) [Jagabata (Oimo)] Naisho no Futarikiri (PriPara) [English] {/u/ scanlations}
[C.R's NEST (C.R)] Yukki- Hatsujouki. Dash Upper (Dog Days) [Chinese] [无毒汉化组] [Digital]
(C91) [Reverse Noise (Yamu)] Usagi wa Konya mo Hatsujouki (Touhou Project)
Rem-rin to Naisho no Oshigoto
Naisho no Honey 2
(Houraigekisen! Yo-i! 17Senme) [Takoyaki-batake (Takoyaki)] Inyaduma wa Hatsujouki - Inyaduma is in Estrus (Kantai Collection -KanColle-) [English] [Doujins.com]
Motto Shitai Joshidaisei ga Kare ni Naisho no Kankei ni Hamacchau Ohanashi
(COMIC1☆10) [Death Para (Tamaki Kurou)] Kitakami-san to Naisho no Naisho (Kantai Collection -KanColle-)
(CR25) [Studio Wallaby (Kokuden Kadotake, Niiruma Kenji, Deep Purple '72)] Purikura no Naisho (Princess Crown)
[Itou Nanami] Naisho no Houkago (COMIC Potpourri Club 2014-07) [Chinese] [黑条汉化]
(C70) [Dr.VERMILION (Riku, Kurasawa Makoto, Petenshi)] Youmu no Naisho! - Youmu's Secret (Touhou Project) [English]
[Maruta] Boku to Kanojo no Hikakuteki Naisho no Nichijou Chapter 2 (English)
(Shota Scratch 18) [Usamimi Zukin (Kosuzu)] Himitsu no Naisho (The Legend of Zelda) [English] =SW=
[Kaitou Yuuhi] Naisho no Oshigoto (Otokonoko HEAVEN Vol. 24) [Chinese] [夜願漢化]
Shiki-nyan to Hatsujouki
[Tridisaster (Saida Kazuaki)] Class no Minna ni wa Naisho Dayo! (Puella Magi Madoka Magica) [Digital]
[Kitsuneya (Leafy)] Chibikko Eirei to Naisho no Okusuri Techou - Young lady hero secret medicine notebook (Fate/Grand Order) [Digital]
Onee-san ni wa Naisho ne
Shota to Dousei Shitetara Hatsujouki ni Haicchaimashita
[Fujisaka Lyric] Kanna to Hatsujouki (COMIC LO 2021-08) [English] [TQM_Translations] [Digital]
[Teruki Kuma] Naisho da yo
(C93) [ParadiseGom (Gorgonzola)] Naisho no Ohime-sama (Dragon Quest XI) [Chinese] [最愛大屁屁x漢化組漢化組]
Kurashiki-sensei wa Hatsujouki Soushuuhen FINAL | Kurashiki Sensei's Mating Season Final Ch.1-3
Mama ni Naisho no Hatsujouki | 對媽媽保密的發情期
(C83) [Mama ni wa Naisho (Purukogi Beach)] Enshoku Niku Sakura - Coquettish Flesh Cherry (Dead or Alive)
Sharo-chan wa Hatsujouki
[Salad] Hatsujouki (COMIC LO 2016-02)
[Kitakata Kuniaki] Himitsu no Keijiban H na Onna no Naisho Banashi [English] {Coff66 & Funeral of Smiles}
(C88) [Sevens Magajin (Nerotarou, Hisayaki Kyuu)] Danua no Hajimete Hatsujouki (Granblue Fantasy)
(Zenkuu no Hasha 5) [momoirohoppe (Rei)] Djeeta-chan wa Hatsujouki (Granblue Fantasy)
[Yuzuponz (Kikira)] Inumimi Seikatsu ~Hatsujouki no Itoko Namahame Tokubetsu Jugyou~ [Digital]
(C83) [Honey Bunny (Kohachi)] Naisho no Nurse-san
(SC49) [Baka to Hasami (Tsukai You)] Naisho no Tsuboeri Himitsu no Itsuki (Heart Catch Precure!)
(C88) [Sweet Candle (Sakuraizumi Yuu)] Naisho no Asobi (THE iDOLM@STER CINDERELLA GIRLS)
[Nekoya] Kyokutou no Naisho (Kyoukai Senjou no Horizon) [Digital]
Naisho no Koukai Nisshi
[Majo Saiban (Mion_orz)] Naisho no Omajinai [Digital]
(C81) [Mimizuku. (Leon no Neko)] Touhou Wan-Nyan Hatsujouki!! (Touhou Project)
[Moo] You-chan to Elune no Hatsujouki (Granblue Fantasy)
[Agata] Naisho no Kakurenbo | Hide And Seek With Friend's Mom (COMIC Megamilk Vol. 18) [English] [vaasi] [Decensored]
(C81) [TIES (Takei Ooki)] Kobato no Naisho. (Boku wa Tomodachi ga Sukunai)
(Reitaisai 14) [Natsuji (Geji)] Hatsujouki no Doremy-san in Gyaku Anal Sareru Hon (Touhou Project)
(C56) [Studio Wallaby (Deep Purple '72, Meguro Sankichi)] Jubei-chan no Naisho (Jubei-chan - Secret of the Lovely Eyepatch)
(C72) [kidnap company (Saitou Tsukasa)] Himitsu no Gashuu - Naisho no Jikan (Kodomo no Jikan)
[Takasugi Kou] Ureta Karada no Hatsujouki - Estral Mature Woman [English] [desudesu, Lazarus H]
(SC15) [Chuuni+OUT OF SIGHT (Kim Chii)] Onee-chan to Naisho 2 Ashita Biyori
[Matsumoto Katsuya] Naisho no Mio Sensei | The secret Mio sensei (COMIC Masyo 2017-02) [English] [desudesu] [Digital]
(C92) [Tenrake Chaya (Ahru.)] Matsurinoyoru no Naisho (Kantai Collection -KanColle-)
Kanna to Hatsujouki
[Tawara Hiryuu] Kanojo ni Naisho de (COMIC Tenma 2015-03) [Chinese] [黑条汉化]
Alicia-mama to Naisho Ecchi Suru Hon
Senpai ni wa Naisho ssu yo | 선배에겐 비밀임다
[Koppe] Koboreru Naisho (COMIC Kairakuten BEAST 2015-11) [Chinese] [绅士仓库汉化]