CHALLENGE
(COMIC1☆7) [ASIANBOY (Hasemi Ryo)] Backstage Hibiki Challenge (THE IDOLM@STER)
(Reitaisai 11) [PUMPERNICKEL (Sumisuzu)] Rusuban Koa-san to Himajin Flan-chan (Touhou Project)
(C88) [Kinqhassin (Koaya Aco)] POCHAMOMI! (Super Sonico)
[Arysuivery, Chiyohan (Ayakase Riberi, Ayakase Chiyoko)] Koa Pache Flan no Kaikata (Touhou Project) [Digital]
Otou-san Challenge
(Reitaisai 13) [Kuusou Monochrome (Abi)] Pachukoa Mix! (Touhou Project)
[ViperXTR] I Challenge You! (Kono Subarashii Sekai ni Syukufuku o!) [English]
Hiyake Ato kukkiri na Otokonoko
Pachukoa Mix!
(iDOL SURVIVAL2) ["Tsu" ga Mittsu. (Tsuttsu)] Akane Challenge!? (THE IDOLM@STER CINDERELLA GIRLS) [Chinese] [无毒汉化组]
(SC16) [Koala Machine (Tokiwata Miki)] Taiyou no Gravity (One Piece)
(Reitaisai 12) [Eucalyptus House (Minikoara)] Kasen-chan to Love Ecchi (Touhou Project) [English] [CGrascal]
[Sen] Makabe no Oshiri Challenge (THE IDOLM@STER MILLION LIVE!)
(C80) [Koakuma Sageha (sage joh)] Shaburotto Dunois (Infinite Stratos) [English] [life4Kaoru]
(C86) [Contamination (eigetu)] Maki Nico Lez Challenge (Love Live!) [Incomplete]
[Angelic Feather (Land Sale)] Flan-chan no Oshiete no Koa Sensei-san (Touhou Project) [Digital]
Tobira no Soto ni Ke tsuya no Ii Neko ga ita no de, Shitsukete Kaineko ni shite miru Challenge.
Nametake Challenge!
Succubus Koakuma to Icha Love Vacation Doutei-kun o Oishiku Itadaki desu
[Nekoarashi (Yana)] Igyo no Kimi to [Digital]
(Puniket 31) [YasunaoZ (Yasunao)] Kokoa wa Rabbit House no Mono o Shiyou shita no kana (Gochuumon wa Usagi Desu ka)
[Taikan Kyohougumi (Azusa Norihee)] Sakura-chan to Oshigoto Challenge - Ona-Hole Challenge with Sakura (Cardcaptor Sakura) [English] [Digital]
(C76) [Arisan-Antenna (Koari)] Love Communication 3+ (THE iDOLM@STER)
(C89) [Sekine (Sekine Hajime)] Gochuumon no Kokoa desu (Gochuumon wa Usagi Desu ka?)
[Shota Mangaya-san (orukoa)] Ibasho ga Nai node Kamimachi shite mita Suterareta Shounen no Ero Manga Ch. 6 [Digital]
Gochuumon wa Kokoa to Yukata desu ka - is the order a cocoa and yukata
(C60) [Koala Kikaku (Mon-Mon)] Mon-Mon Land X
(C70) [Koala Kikaku (MON-MON)] MON WORKS IV (Various)
(C91) [Angelic Feather (Land Sale)] Flan-chan no Saimin Nikubenki Challenge (Touhou Project)
(C90) [CHOCOLATE CUBE (Miwa Futaba)] Chino-chan wa Goshuushin Kokoa√ | Chino-chan is Infatuated with Kokoa√ (Gochuumon wa Usagi desu ka?) [English] {Hennojin}
(C95) [Kinqhassin (Koayako)] Kyokou no Umibe nite (Fate/Grand Order)
JK Tamamo no Shuugaku Ryokou Oppai Challenge
[Homunculus] Boy meets Girl (COMIC Kairakuten 2018-09) [Chinese] [無邪気漢化組] [Digital]
[Sakura Garden (Shirosuzu)] Chaldea Outdoor Challenge Abby-chan to Issho 3 | Chaldea Outdoor Challenge with Abby-chan 3 (Fate/Grand Order) [Digital] [English] [The Blavatsky Project]
Oshikko Challenge!? | 小便挑战!?
(C86) [Yamakawa Den'enfuukei (Yamada, Kawada)] HERE COMES A NEW CHALLENGER!! (High Score Girl) [English] [FEPO]
(C91) [Kinqhassin (Koaya Aco)] Hyonna Koto kara Kyuu ni Otona ni Natte Shimatta Shimakaze-san to Issho ni Itsuzukeru to Kou Naru (Kantai Collection -KanColle-)
(SC40) [Delayder (Makinon TM)] Yousei-san no?! Himitsu no Bouken no Tobira Preview ver (Challenge First-Year-Student)
[Koa (Various)] Comic Dengeki Inuoh 2 (Various)
Futanari Milk Challenge 5 | 迫真水泳部・扶她的里技―第五章
Ore no Kanojo wa Koakuma Kokoa-san. 4
[种植园汉化]kokoa【小魔女】
(SUPER25) [Bekkoame. (Bekko.)] Koi Gusuri - Love drug (Inuyasha)
(Rio no Carnival 10) [Arisan-Antenna (Koari)] Gion no Yoru ni -Zenyasai (Akadon Miyabi)
(Reitaisai 12) [Eucalyptus House (Minikoara)] Kasen-chan to Love Ecchi (Touhou Project)
[Shota Mangaya-san (orukoa)] Ibasho ga Nai node Kamimachi shite mita Suterareta Shounen no Ero Manga Ch. 6 | A Dirty Manga About a Boy Who Got Abandoned and Is Waiting for Someone To Save Him Ch. 6 [English] {Chin²} [Digital]
(C95) [Kinqhassin (Koayako)] Zoku Kyokou no Umibe nite - Master Hada ga Moto ni Modoranain desu kedo! (Fate/Grand Order) [Chinese] [黑锅汉化组]
Geneki Super Idol Ikaseai Challenge! Clear de 100-man Yen! Shippai Suru to AV Debut!?
Karaoke Challenge
Doki Doki ❤ Ticket Challenge! | 心跳不已的搶票大挑戰!
Tekikoku no Onna Heishi to Mujintou Seikatsu 1-3
(C54) [Koa (Various)] DENGEKI INUOH 1998 SUMMER (Various)
[Koala Machine (Tokiwa Kanenari)] Ai no Sainou (King of Fighters)
(Aka no Hiroba 5) [Suzunaridou (Izumi Yukiru)] Koakuma de Hokentaiiku (Touhou Project) [Chinese] [贴吧汉化] [Incomplete]
[Shota Mangaya-san (orukoa)] Kyokon Shounen to Ego Senpai no Ero Manga [Chinese] [Digital]
Kurokoshi You] Challenge Week
Super Libido Challenge
Naisho no Enkou Challenge | Secret Sugar Daddy Challenge
HERE COMES A NEW CHALLENGER!!
Captain Saimin Icha Love Challenge
Kokoa-chan Hajimete no Seitai Massage
futanari milk challenge 5
Namaiki Kuchikukan Wakarase Challenge | I'll Make You Understand Challenge
(C96) [Akairo Kurena (Kurenai)] Jeanne Alter to Dakkou Challenge!! (Fate/Grand Order)
Gochuumon wa Kokoa to Apron desu ka?
(C86) [Marked-two (Hideo)] Taihou Challenge! (Kantai Collection -KanColle-) [Chinese] [CE家族社]
Kaitou Kokoa-chan
(C63) [Kodomo Challenge (various)] Mainiti-ga-Kodomo-no-hi
(C89) [Akuten Soushin (Kokutou Nikke)] Koakuma Ishu Botai Soukan (Touhou Project)
(C75) [Koakuma Sageha (Sage Joh)] Macross.zip (Macross Frontier)
Tickle Massage Chair Mini - Million Yen Challenge
[Kameyoshi Ichiko] Kanako Challenge (COMIC LO 2020-09) [English] [LoliAce] [Digital]
(C92) [Kinqhassin (Koaya Aco)] Lip no Passion (Fate/Grand Order)
(COMIC1☆13) [Ame Usagi (Amedamacon)] Koko Chino Kekkon Shimashita (Gochuumon wa Usagi desu ka?)
Koakuma no Koaku-chan
[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]
(CCOsaka76) [Arisan-Antenna (Koari)] Itsudemo Nakayoshi★ (Kaitou Tenshi Twin Angel 2)
JC Chinpo-beya Ikkagetsu Seikatsu Challenge!
[Blossom Sphere (Sakurayu Haru)] Koakuma ga Patchouli ni Biyaku Semen Sosoide Toriko ni Shichau Hon (Touhou Project) [Digital]
(C94) [Sakura Garden (Shirosuzu)] Chaldea Outdoor Challenge Abby-chan to Issho (Fate/Grand Order) [Chinese] [脸肿汉化组]
Aisha Challenge 4
Koakuma no Koaku-chan 0
(C99) [Chocolate Jam (Koala)] Kawaii Koto wa, Ecchi Seyo! (Fate/Grand Order)
Joushiki Kaihen Youkoso Touhou Kissa e! ~Succubus Koakuma Hen~
Zetsurin Challenge
(Aka no Hiroba 5) [Suzunaridou (Izumi Yukiru)] Koakuma de Hokentaiiku (Touhou Project)
[Shota mangaya-san (orukoa)] Daishiri shonen to sakka-bu senpai no ero manga (Second part)
Marushiki Koumakyou Patchouli & Koakuma
(C90) [CausCiant (Yamaiso)] Koakuma Subliminal Zenra (Touhou Project)
Challenge Week