(C63) [Kodomo Challenge (various)] Mainiti-ga-Kodomo-no-hi
[Mikeke] Hatena Manga - Semete Yacchae! (Challenge First-Year-Student)
(SC39) [Various (Various)] Hatena? Challenge! (Challenge First-Year-Student)
(C65) [kodomo challenge (Various)] Shukudai ga Owaranai
[Igakino Agenasu] Ekimae Seieki Bokin!~Joshikousei Dokidoki Volunteer~ (Dokidoki Seieki Bokin ~Joshikousei to Kozukuri dekiru Sekai~) [English]
(SC39) [Nounai Kanojo, Ningen Modoki, Tateyoko Hotchkiss, Kagi Node (various)] Hatena? Challenge! (Challenge First-Year-Student)
(SC40) [Delayder (Makinon TM)] Yousei-san no?! Himitsu no Bouken no Tobira Preview ver (Challenge First-Year-Student)
(C64) [kodomo challenge (Various)] Natsu no Kansatsu Nikki
[DIN] Seieki Tamekomi Challenge | Semen Storage Challenge [English]
(C64) [kodomo challenge (Various)] natsu no kansatsu nikki | Summer observation diary (Original) [English]
