My Sister Momoko (2003)
Original title: もも子、かえるの歌がきこえるよ。
My Sister Momoko is a 2003 Japanese-language animation movie directed by Setsuko Shibuichi, with a running time of 1h 20m. It stars Koki Uchiyama, Kurumi Mamiya and Jin Yamanoi.
Momoko, who attends a special school, is both mentally and physically disabled. Every morning she becomes peevish because she can't go to the ordinary school with her twin brother Riki.