Aku no Seitokaichou HARD
Dairoku! Otoile Challenge
(C92) [Andorogynous (Kiyose Kaoru)] Futanari Milk Challenge
(Kotonoha's Festa 2) [Milk Pudding (Jamcy)] Akane-chan Challenge! 2.5-kaime (VOICEROID) [Chinese] [古早个人汉化]
(COMIC1☆10) [Daihonei (TYPE.90)] EMPIRE HARD CORE 2016 SPRING (Oshiete! Galko-chan)
[Bosshi] Kitsui yo Saki-sensei! (Wet and Hard Saki Sensei!) [English] [RyuuNoTamashii]
(Houraigekisen! Yo-i! 29Senme) [Daihonei (TYPE.90)] EMPIRE HARD CORE 2017 SPRING (Kantai Collection -KanColle-)
UNKNOWN UNLOCK CHALLENGE | 크로스비츠 동인지
Zuri Cure Max Hard
(C97) [Yusei Haguruma (Victanyas)] Namaiki Kuchikukan Wakarase Challenge | I'll Make You Understand Challenge (Azur Lane) [English] {Doujins.com}
[Crimson Comics (Carmine)] Nel Hard (Star Ocean 3)
(COMIC1☆12) [Kazeuma (Minami Star)] Sekaiju no Anone 29 Lilisoro Hard (Etrian Odyssey)
W&W Dub rules Ch. 1
Toka 1 hour drawing challenge
Space Detective Jade Dan Indecent Challenge
(COMIC1☆6) [Daihonei (TYPE.90)] EMPIRE HARD CORE 2012 SPRING (Ano Natsu de Matteru)
[Hardboiled Yoshiko] Yakusoku (COMIC Kairakuten 2016-4) [Chinese] [漢化組漢化組×Foxglove]
(C94) [ANDOROGYNOUS (Kiyose Kaoru)] Futanari Milk Challenge 4
(C76) [bolze.] Hard de Hard na Monogatari (Hayate no Gotoku!)
(COMIC1☆10) [Daihonei (TYPE.90)] EMPIRE HARD CORE 2016 SPRING (Oshiete! Galko-chan) [Chinese] [final個人漢化]
(C88) [Daihonei (TYPE.90)] EMPIRE HARD CORE 2015 SUMMER (Mobile Suit Gundam The Origin)
Ko-Gil Challenge
Futanari Milk Challenge 2
Iemoto Challenge Series - Jinrui Hasshou no Chi de Mikai no Buzoku to Bunka Kouryuu Isshuukan
[Sakura Garden (Shirosuzu)] Chaldea Outdoor Challenge Abby-chan to Issho (Fate/Grand Order) [Digital]
HARD CANDY
At first glance, it looks like a man swimsuit challenge + Textless + Bonus
[Hard Chrome] Manga E Tora! (Phantasy Star Online 2)
(black cat) sephiria hard 3 (crimson comics)
(COMIC1☆13) [Daihonei (TYPE.90)] EMPIRE HARD CORE 2018 SPRING (Violet Evergarden, Karakai Jouzu no Takagi-san)
(C95) [Labomagi! (Takeda Aranobu)] W Jeanne to Off-Paco Challenge (Fate/Grand Order) [Chinese] [黎欧x新桥月白日语社汉化]
[Yonemochi Akihiko] adult challenge 1
(C94) [Daihonei (TYPE.90)] EMPIRE HARD CORE 2018 SUMMER (Hinamatsuri)
HARD CANDY FULL COURSE
(C88) [Nipple Mokuba (Parabola)] SUPER HARD Hatsujou Imouto 2 | SUPER HARD Breeding Imouto 2 (Touhou Project) [English]
[Hardboiled Yoshiko] Yakusoku (COMIC Kairakuten 2016-4)
JK Tamamo no Shuugaku Ryokou Oppai Challenge
Seieki Tamekomi Challenge
(C93) [Unagiyasan (Hanamiya Natsuka)] Otona Challenge!! [Chinese] [脸肿汉化组]
SAREN HARD 3
[Miyamoto Yuu] Ijimenaidene - Please Be not Hard on Me
Futanari Milk Challenge 6
(C64) [kodomo challenge (Various)] Natsu no Kansatsu Nikki
(C78) [Dennou Fuyu Mikan (Ueda Rieko)] Otona Challenge (Final Fantasy 4)
[Shiwasu no Okina] Boku no Bokki Penis o Rokuga Shite Ikina Yo | Go Ahead and Film My Hard Penis Ch. 4 (COMIC Aun 2016-09) [English]
[Kogasaki Yuina] JK Tamamo no Shuugaku Ryokou Oppai Challenge (Fate/Grand Order)
(Futaba Gakuensai 7) [1000AP (Various)] Kodomo de Challenge 3 (Futaba Channel)
[Miraiya (Asari Shimeji)] Bumbling Detective Conan - File 8: The Case Of The Die Hard Day (Detective Conan)
[Shimajiya (Shimaji)] Asashio-chan wa Ganbariya-san | Asashio-chan is a Really Hard Worker (Kantai Collection -KanColle-) [English] {doujin-moe.us} [Digital]
FutaKemo HARD - Hatsujou Futanari Chinpo De Shirudaku-Chudashi Koubi!
[Satuyo] Pool de Challenge! Boyish (COMIC LO 2017-12) [Chinese] [code183汉化] [Digital]
(C80) [CELLULOID-ACME (Chiba Toshirou)] PARTY HARD (Dragon's Crown)
Maki Nico Lez Challenge
(C67) [Hard Flogs (Haoto Luna)] Hard Flogs vol.2 (Fate/stay night)
(C93) [Komatta Tomato (Yuuki Miyabi)] Akatsuki-chan Mayonaka no Otoile Challenge (Kantai Collection -KanColle-)
[Niliu Chahui] Male Swimsuit Challenge [English]
Kanade Challenge Kouhen
[Sakura Garden (Shirosuzu)] Chaldea Outdoor Challenge Abby-chan to Issho | Chaldea Outdoor Challenge with Abby-chan (Fate/Grand Order) [English] [The Blavatsky Project] [Digital]
I Challenge You!
[Hardcore Zayaku Souten (Hirayan)] Sneaking & make Love (Fate/Grand Order) [Digital]
[Pint Size (Tenrai)] Hard Core Blade Ma Sawa Zenshin Kan (Queen's Blade)
Card Fighter In Hardcore Rules Haisha wa Shousha ni Zettai Fukujuu
(C73) [Hard Puncher Maniax (Shibahara Gocho)] Vocaloid Shoukougun (VOCALOID2)
[Satuyo] Pool de Challenge! Boyish | Challenge at the Pool! Boyish (Peaceful Ecchi!) [English] [Doki Fansubs+Yosh]
#SoniCha Ikuiku Challenge Short Rough Stories
Go Ahead and Film My Hard Penis Ch. 1
(C80) [CELLULOID-ACME (Chiba Toshirou)] PARTY HARD (Dragon's Crown)
Too Drunk to Hard-on Ch. 1
Naoto Works Hard On Kanji-kun's Birthday
Challenge Hanayome Ichinensei
[Hardboiled Yoshiko] Seisetsu (Towako 6) [Chinese] [萌纹个人汉化] [Digital]
[Cuvie] Hard Worker [English] [SaHa]
EMPIRE HARD CORE 2019 SPRING
Fukujuu to Amagami | Hard to say I love you 1-2
(Futaket 5) [Temparing (Tokimachi Eisei)] Binbin Amazoness Ecstasy | Rock Hard Amazoness Ecstacy (Seiken Densetsu 3) [English] [q91] [Incomplete]
(Nikudarake!!!!!! Gachinko Butoukai in chaos) [Kasuga Kikaku (Terujirou)] Gekokujou ni Chousen! | Junior Dominating Senior Challenge! [English]
Zenseito Kyoushokuin 509-mei ni Zettai Fukujuu Suru Kounai Yuiitsu no Josei Hard SM Dorei Kyoushi Kouhen
Mordred nipple Challenge | 莫德雷德乳首挑戰
(C86) [Marked-two (Hideo)] Taihou Challenge! (Kantai Collection -KanColle-) [Chinese] [CE家族社]
(C85) [Daihonei (TYPE.90)] EMPIRE HARD CORE 2013 WINTER (Space Battleship Yamato 2199) [English] {doujin-moe.us}
W&W Dub rules Ch. 2
Tickle Massage Chair Mini - Million Yen Challenge
(C86) [Contamination (eigetu)] Maki Nico Lesbian Challenge (Love Live!) [Incomplete]
Onii-chan swallowing challenge!
[Kisei Toukyoku (Richard Bahman)] Houkago Dairizuma 3 Sotsugyoushiki wa Ninpu de... [English] [Digital]
(C92) [Kyougetsutei (Miyashita Miki)] Anzu Hard Fork PREVIEW (THE IDOLM@STER CINDERELLA GIRLS)
Jisatsu Challenge | 自殺挑戰
Nanjamo to Ura Gym Challenge!! | 奇树的秘密相声挑战!!
(Angel Time 3) [Syunkan Saidaihusoku, Night FUCKERS (Pony R, Mitsugi)] Phantom Challenge! ~Futari no Domannaka Itadakimasu!~ (Kaitou Tenshi Twin Angel)
(C93) [Unagiyasan (Hanamiya Natsuka)] Otona Challenge!!
(SC56) [Chilled Cherry Blossom (Sakura Chiru)] Meijou Shigatai Nyaruko-San Ero Yome Hon no Younamono | Hard to Describe Book About Nyaruko-san as an Erotic Wife and that Sort of Thing (Haiyore! Nyaruko-san) [English] {Dame!trans}