Hotori: Simply Wishing For Hope

Suzu is a robot being imprinted with the memories of a deceased boy named Ryo. He meets Hotori, a girl suffering from a disease that is slowly erasing her memories. As Suzu gains a past that isn't his, Hotori loses her own. They form a deep friendship, finding solace in each other's opposite struggles. AKA Hotori: Tada Saiwai wo Koinegau.