(C97) [DECOPPACHI (Hidiri Rei)] DT Chinpo 100-pon Acme Challenge!! (Kiratto Pri Chan)
[Satuyo] Pool de Challenge! Boyish | Challenge at the Pool! Boyish (Peaceful Ecchi!) [English] [Doki Fansubs+Yosh]
Okei-san no Nukinuki Dosukebe Challenge
Kyokon Shoujo Nyoudou Challenge!
ETD Challenge.
A Challenger Has Appeared Which Naturally Leads To A Duel | Chousensha ga Arawareta - Shizen na Nagare de Kettou
You Are Challenged by Kogal Takuha | La Sfida
Namaiki Kuchikukan Wakarase Challenge | I'll Make You Understand Challenge
(C94) [ANDOROGYNOUS (Kiyose Kaoru)] Futanari Milk Challenge 4 | [番外篇]——快感觉醒!便器化的先辈! [Chinese] [鬼迷日眼的莱科少校个人川话化]
Akane-chan Challenge! | 아카네짱 챌린지!
Dairoku! Otoile Challenge 2
Futanari Milk Challenge 2 | 扶她榨乳挑战2
Kodomo de Challenge 2
(Futaket 14) [ANDOROGYNOUS (Kiyose Kaoru)] Futanari Milk Challenge 3 | 扶她榨乳挑战 3 [Chinese] [黄记汉化组]
[Yurikawa] Futago Challenge (Toshiue Kanojo Alternative) [English] [PSYN]
[Kyuu (Shooya Akira)] Futtou Challenge 2 (Sora no Manimani)
Eroi Bunnyue ni Shasei Gaman Shoubu o Idomu. | Challenging the Lewd Bunny to a Cum Endurance Battle.
Twin Challenge ch. 1
Takagi Airi no 10-pun Challenge | Takagi Airi's 10 Minute Challenge
[RoriE-Do] VS Kishi no Honoo no Challenger (VS Knight Lamune & 40 Fire)
Futanari Milk Challenge 5 | 扶她榨乳挑战 5
[ANDOROGYNOUS (Kiyose Kaoru)] Futanari Milk Challenge 3 [Digital]
(C90) [Akausagi (Fukuyama Naoto)] 100 challenge (Hundred) [English] [Tigoris Translates]
[Hara] Misaki-chan no Lotion Challenge
[Dokudenpa Jushintei (Kobucha)] 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 [Chinese] [同文城] [Digital]
[Nekomata Naomi] Here Comes a New Challenger! (COMIC Kairakuten Beast 2007-04) [English] [Clearly Guilty Translations]
(C86) [Contamination (eigetu)] Maki Nico Lez Challenge (Love Live!) [Incomplete]
HERE COMES A NEW CHALLENGER!!
(C94) [Moruda Ramenya (Moruda)] Okay-san no Nukinuki Dosukebe Challenge (Girls und Panzer)
[Sakimori Dan] Sanae Challenge!! Ch. 1-2
(C86) [Yamakawa Denenhuukei (Yamada, Kawada)] HERE COMES A NEW CHALLENGER!! (High Score Girl) [Chinese] [oo君x赤蜘蛛聯合漢化]
Seieki Tamekomi Challenge
(C94) [ANDOROGYNOUS (Kiyose Kaoru)] Futanari Milk Challenge 4