(C65) [kodomo challenge (Various)] Shukudai ga Owaranai
(SC39) [Various (Various)] Hatena? Challenge! (Challenge First-Year-Student)
Kodomo de Challenge 2
(C63) [Kodomo Challenge (various)] Mainiti-ga-Kodomo-no-hi
(Futaba Gakuensai 7) [1000AP (Various)] Kodomo de Challenge 3 (Futaba Channel)
P5 Futaba book
(Futaba Gakuensai 9) [1000AP (Various)] Kodomo de Challenge 5
Kawakami Sensei to Futaba no Himitsu Kojin Jugyou | Una lección privada y secreta con Futaba y Kawakami-sensei
(C64) [kodomo challenge (Various)] Natsu no Kansatsu Nikki
(C64) [kodomo challenge (Various)] natsu no kansatsu nikki | Summer observation diary (Original) [English]