Boku dake ga Inai Machi

Synopsis

Satoru wakes up in the year 2003, having been in a coma for fifteen years following Yashiro's attempt to kill him, and discovers that he has lost most of his memories, including the killer's identity. While undergoing rehab, Satoru is visited by Kayo, who has grown up to become a housewife with a child, encouraging him try harder to walk again. Later, he meets a leukemia patient named Kumi, who is to undergo surgery, as well as Yashiro himself, who has become a politician. On the night before Kumi's surgery, Yashiro brings Satoru to the rooftop just as he regains his memories.

(Source: Wikipedia)