(Yarinsai 3) [Mousouzoku no Soukutsu (Various)] Yuuka Kuro Shitagi Goudoushi Kuro Himawari Chuui Keihou (Touhou Project)
(C82) [THE FLYERS (Naruse Mamoru)] Ako-chan to Naisho no XX + plus (Saki Achiga-hen)
[Hasemi box (Hasemi Ryo)] Futari to Shota no Naisho Graffiti (Koufuku Graffiti)
Mori no Shokushu ni Goyoujin ~Itoshi no Yuuka-sama~
(C85) [Nipopo Crisis (Genka Ichien)] Tanoshii Koto o Naisho ni Shiyou. Yousumi Ban (Various)
Taimanin na Kazami Yuuka-san
[Matsumoto Katsuya] Naisho no Mio Sensei | The secret Mio sensei (COMIC Masyo 2017-02) [English] [desudesu] [Digital]
(CR31) [Studio Wallaby (Deep Purple '72)] Su no Naisho!! -The secret of Su- (Vampiyan Kids)
(CCOsaka94) [Pucchu (Echigawa Ryuuka, Murata., Sahara Wataru)] Sakuranbo (Naruto)
[Usi] Otto ni Naisho de Ajimi Shite Ch.1-7
[BOSS Chin] Naisho no Ota x Bitch (COMIC Shingeki 2012-10) [English] [desudesu] [Digital]
Tokumori! Yuuka-san
[Rokuichi] Ririn-san no Naisho no Kao to Daiji na Oheya (COMIC HOTMILK 2018-07) [Chinese] [無邪気漢化組] [Digital]
[Nacchuushou (Amazon)] Kazami Yuuka ga Shiranai Uchi ni Ecchi na Massage o Sarechau Hon (Touhou Project) [Digital]
(C86) [Team Twin Devils (Nelo Angelo)] Sarani Seiyoku o moteamashita Yuukarin no Asobi W (Touhou Project)
(Colormas ∞ ~infinity~) [Ryuukakusan Nodoame (Gokubuto Mayuge)] Matoba Risa no Image Video Taikenki (THE IDOLM@STER CINDERELLA GIRLS)
(C90) [Toculitoc (Tokurito)] Yuuka-sama to Onsen de Ero Ero Love Love Shichau Hon (Touhou Project)
[Nohri Isawa] Naisho no Kansatsu Nikki (Secret Observation Journal) [English] [Mistvern]
[Wagashi Kenkyuukai (Monaka, Suzuki)] Mitsu to Tadagoto (Sengoku Basara)
[Barbaroi no Sato (Ryuuka Ryou)] Hadashi no VAMPIRE 2 (Vampire Princess Miyu)
(C87) [Pucchu (Echigawa Ryuuka)] Konoha no Secret Service (NARUTO)
[Yuki Kagerou (KANZUME)] Kazami Yuuka no Shigyaku Tetsugaku (Touhou Project) [Digital]
[Kamiya Ogawa] Mama ni Naisho Mama to Naisho (COMIC Penguin Club Sanzokuban 2018-11) [Digital]
[Hasemi_box (Hasemi Ryo)] Futari to Shota no Naisho Graffiti (Koufuku Graffiti) [Chinese] [靴下漢化組] [Digital]
(COMIC1☆5) [Shimoyakedou (Ouma Tokiichi)] Naisho no Mahou (Puella Magi Madoka Magica)
[Black_Sugar(Kari)] Touhou Futabusa ~ Yuuka Kazami ~ 2 (Touhou Project) [Digital]
(C71) [Pyonpyororin (Akoko.)] Ano... Naisho ni shite kudasai ne? (Suzumiya Haruhi no Yuuutsu) [English]
(C94) [Kurumi Namiki (Mita Kurumi)] Atago-san to Naisho no Ecchi (Kantai Collection -KanColle-)
[kedamono (Tori Hrami)] Naisho no Undoukai Second Season [Colorized] [Digital]
[blue killer (Doku Denpa)] Naisho no Yodare Sex [Digital]
Naisho de! Twins
(C91) [Fujiya (Nectar)] Naisho na Shinomiya-san
(C71) [Ohtado (Oota Takeshi)] Naisho da yo! Mahou no Club Katsudou (Sasami Magical Girls Club)
(SC53) [Penetrate (Reiha)] Yuuka H Taiyou no Hata Nite (Touhou Project)
[Datsuryoku Kenkyuukai (Kanbayashi Takaki)] Yuuwaku Shite Kuru Otouto [Chinese] [瑞树汉化组] [Digital]
Yuuka ga do S de Alice ga M de | Yuuka is a Sadist, While Alice is a Masochist
[774] Naisho no Hentai Sex
(C93) [J.D.World (Fumi Miyabi)] Onee-san ni wa Naisho ne (Kantai Collection -KanColle-) [Chinese] [无毒汉化组]
(Puniket 23) [Suitekiya (Suitekiya Yuumin)] Naisho no HONya-san (Watashi no Ouchi wa HONya-san)
(CINDERELLA FESTIV@L) [Aozora Shoujo (Shirane Taito)] Naisho no Gao Gao Ecchi (THE IDOLM@STER CINDERELLA GIRLS)
Kouen no Naisho na Koto
(C90) [Ryuukakusan Nodoame (Gokubuto Mayuge)] Onsen Ryokan de Harem Square (THE IDOLM@STER CINDERELLA GIRLS)
(Reitaisai 9) [Snack Yoshie (Sawa)] Yuukana (Touhou Project)
(CR31) [Studio Wallaby (Deep Purple '72)] Suu no Naisho!! -The secret of Su- (Vampiyan Kids)
Sensei to Hayase Yuuka
[Asahina Makoto] Naisho no Wareme Lesson
(C85) [Galaxy Monooki (Hanazuka Ryouji)] Yuukarin ga Seme Sasete Kureru Hon (Touhou Project) [English] [EHCOVE]
(CINDERELLA FESTIV@L) [Aozora Shoujo (Shirane Taito)] Naisho no Gao Gao Ecchi (THE IDOLM@STER CINDERELLA GIRLS) [English]
(COMIC1☆8) [TriaL3 (Various)] Naisho no Imouto Ecchi
(Naisho no Jikan) [Apricot Sirup (Hi~mosu, Marui)] Doki Doki Kodomo Time (Kodomo no Jikan)
Osananajimi ga Naisho de Yatteiru SNS o Mite Kofun Shite Shimau Ore!!
(COMIC1☆13) [Ryuukakusan Nodoame (Gokubuto Mayuge)] Tachibana Arisu no Image Video Taikenki Imouto Hen (THE IDOLM@STER CINDERELLA GIRLS)
(C86) [Go-Go-Merry-Go-Round (Kasai Ema)] Naisho no Natsuyasumi. (Neon Genesis Evangelion) [English] [CGrascal]