(C63) [Kodomo Challenge (various)] Mainiti-ga-Kodomo-no-hi
Teisouring Challenge
(C92) [Slime Kikaku (Kuriyuzu Kuryuu)] Akatsuki no Oyome-san Challenge | Akatsuki's Bride Challenge (Kantai Collection -KanColle-) [English] {Doujins.com}
Gekokujou TRAP | Juniors Dominating Seniors TRAP
[Yurikawa] Futago Challenge | Twin Challenge (Toshiue Kanojo Alternative) [English] [PSYN+DMD]
[Mikeke] Hatena Manga - Semete Yacchae! (Challenge First-Year-Student)
Junior Idol datte Ecchi Dekirun da yo | Even a Junior Idol can do lewd things
[Satuyo] Pool de Challenge! Boyish | Challenge at the Pool! Boyish (Peaceful Ecchi!) [English] [Doki Fansubs+Yosh]
(SC39) [Nounai Kanojo, Ningen Modoki, Tateyoko Hotchkiss, Kagi Node (various)] Hatena? Challenge! (Challenge First-Year-Student)