Ani kaeru (2009)

Koichi is the eldest child of the Noda family, who essentially had to become the head of the house after his father disappeared. One day, he also disappears, leaving behind his fiancee Makiko and the rest of the family. Three years later, he comes home after a traffic accident, unable to say a word. Wondering where he was and why he left, Makiko begins a journey to retrace his steps.