Where can I watch Penance in United States?

The murder of a young girl leaves the inhabitants of a small Japanese village in shock. The body of Emili is found by four classmates with whom she was playing. The murder is never solved. Emili's mother, Asako, is torn by grief and puts a curse on the four girls when they claim not to remember the killer's face. Each of the girls, in their own way, will do penance for their silence.