Please Don't Go

A girl named Ashlynn and a guy named Tsumugu. Ashlynn had brain tumor and dementia, she would forget everything at the end of the day she even forgets where she is men't to go, she does to a high school and there she meets Tsumugu after a few days they both became friends but everyday she forget who Tsumugu is, but he never gives up until she remembers him for ever.