[Bonnouji Yura (Bonnouji Yura)] A story about a (Ex) Great Sword Master Adventurer who challenges a dungeon where tentacles lurk [English] [unknown scanlations] [Digital]
[AXZ (Katatuka Kouji)] Yui-chan SEX Challenge!! (Yuyushiki) [Digital]
Chiisana Yuusha ga Teki Onna Kanbu ni Tatakai o Idomi Eroi Koto Sareru Hon | The Tiny Hero Challenges The Enemy's Female Leader To A Battle And Gets Some Lewd Shit Done To Him!
Toka 1 hour drawing challenge
The Price of Failure
Hitori Challenge Rakugaki
Dosukebe Muramatsuri 1 - Jigoku no Cli Zeme Mesugaki Taikyuu Renzoku Acme Challenge Hen
(C85) [Viento Campanilla (Suzuhane Suzu)] Welcome to Black Harem ~Gebokuka Shippai~ | Welcome to Black Harem - Servant's Failure (To Love-Ru Darkness) [English] {doujin-moe.us}
Hana Challenge!
Petit Xu Lewd Challenge (Revenge Edition) + Extras
Geneki Super Idol Ikaseai Challenge! Clear de 100-man Yen! Shippai Suru to AV Debut!?
(C101) [chori (Chorimokki)] Nanjamo to Ura Gym Challenge!! (Pokémon Scarlet and Violet)
Twin Challenge ch. 1
(C91) [Molossan (Morochin-san)] DokiDoki Mesuiki! Challenge!! (Various) [Chinese] [不協和音漢化]
Flan-chan no Saimin Nikubenki Challenge
Karaoke Challenge
(Nikudarake!!!!!! Gachinko Butoukai in chaos) [Kasuga Kikaku (Terujirou)] Gekokujou ni Chousen! | Junior Dominating Senior Challenge! [English]
Male Swimsuit Challenge
Petit Xu Lewd Challenge + Extras
[cherry*pepper (Yukian)] Rensei Shippai | Failed Synthetize (Granblue Fantasy) [English] [aerozext] [Digital]
(C90) [Akausagi (Fukuyama Naoto)] 100 challenge (Hundred)
Eiketsu Ninja Gaiden ~Haiboku Hen~ | The Champion's Ninja Side Story ~Failure~
Double Up Challenge!
[Kogasaki Yuina] JK Tamamo no Shuugaku Ryokou Oppai Challenge (Fate/Grand Order)
[Rald] Geneki Super Idol Ikaseai Challenge! Clear de 100-man Yen! Shippai Suru to AV Debut!? (Shadowverse) [Chinese] [世界树个人汉化]
[kogasaki yuina] JK Mamamo No Shuugakuryokou Oppai Challenge | JK玉藻的畢業旅行ㄋㄟㄋㄟ大冒險 [Chinese] (Fate/Extra)[三色的大猩猩翻譯同盟]
At first glance, it looks like a man swimsuit challenge + Textless + Bonus
Fail of Witches
(C92) [Milk pudding (Jamcy)] Akane-chan Challenge! (VOICEROID)
[Ryu-Seki-Do (Nagare Hyo-go)] 炎姫様スワップ ( Chivalry of a Failed Knight, The Asterisk War )sample
[Niliu Chahui] Male Swimsuit Challenge [English]
(SC39) [Various (Various)] Hatena? Challenge! (Challenge First-Year-Student)
(C94) [ANDOROGYNOUS (Kiyose Kaoru)] Futanari Milk Challenge 4
UnknownUnlockChallenge
Dr.BUG Containment Failure
Planning AV: One towel men's bath challenge in St. Louis and Honolulu
Okusama Challenge - Challenge of Wife
[Mizu] PokaPoka After (Kids Challenge) [English] [QTR]
Namaiki Kuchikukan Wakarase Challenge | I'll Make You Understand Challenge
Imouto wa Juken ni Ochita | My little sister failed her entrance exam.
[Mariana Kaikou Kikaku (Mikami Hokuto)] Shimakaze-kun Challenge Shite Itara, Mogami-kun ni Encount Shita Ken. (Kantai Collection -KanColle-) [Digital]
(COMIC1☆6) [Roshiman (Masa-nii)] Tenkuu no Hanayome ni Narenakatta Onna II | The Woman Who Failed to Become the Heavenly Bride II (Dragon Quest V) [English] [Chocolate]
Renzoku Kyousha Challenge
[Kawai] ETD Challenge.
Price of cast "Berserk" fail.
[kogasaki yuina] JK Mamamo No Shuugakuryokou Oppai Challenge | JK玉藻的畢業旅行ㄋㄟㄋㄟ大冒險 [Chinese] (Fate/Grand Order)[三色的大猩猩翻譯同盟]
Kodomo Challenge
DT Chinpo 100-pon Acme Challenge!! | 100 Virgin Cock Orgasm Challenge!!
Zetsurin Challenge
Maki Nico Lez Challenge
Imasara Shampoo Bottle Challenge o Suru Suieibu Coach no Manga | 现在才来挑战洗发水罐子的游泳部教练的漫画
(Shoujo Senryaku Saizensen 02) [Tagamekan (Nishi Tagame)] Seneki Shippai -Failure- (Girls' Frontline) [Chinese] [沒有漢化]
TS-kko Otokoyu Challenge!
Takagi Airi no 10-pun Challenge | Takagi Airi's 10 Minute Challenge
(C69) [Digital Tambourine (hiiaru)] AbfaIL (Various)
[Hanafuda Sakurano] Shippai wa Seikou no Moto? | Failure teaches success? (COMIC BAVEL 2017-02) [English] [Tea Eye Loser] [Digital]
Chaldea Outdoor Challenge Abby-chan to Issho
Kanade Challenge Kouhen
MISSION FAILED(Sennen Sensou Aigis)
Chaldea Outdoor Challenge Abby-chan to Issho 3
Shippai! Otori Sousa | Failure! Investigation Bait
(C96) [Akairo Kurena (Kurenai)] Jeanne Alter to Dakkou Challenge!! (Fate/Grand Order)
Akane-chan Challenge! 2.5-kaime
[Sameda Koban] BOTSURAKU ♥ Ojou-sama | Failure ♥ Princess [English] [Thetsuuyaku]
#SoniCha Ikuiku Challenge Short Rough Stories
(COMIC1☆11) [High Tech Pen Case (Tam-U)] Kono Da-Maid to Mitsudan o! | Private Talk With a Failure Maid! (Kono Subarashii Sekai ni Syukufuku o!) [English] {Doujins.com}
Witch's Failure
Kodomo de Challenge 2
Okay-san no Nukinuki Dosukebe Challenge
[Yoriu Mushi] Kokuu Kara no Chousen - Challenger from the Sky
Imasara Shampoo Bottle Challenge o Suru Suieibu Coach no Manga
[Hibon (Itami)] Yuu-kun CHALLENGE!! Kobe Hen [Digital]
Futanari Milk Challenge | 扶她榨乳挑战
[d.a.p] UnknownUnlockChallenge
(SPARK12) [Kaniparadise (Kanitaro)] mission failed (Persona 5)