Sayonara no Moment

"Hey, why did you appear in front of me again...?"

Shunya is haunted by the death of his childhood friend Ryousuke, who died in an accident, when a stranger, Tsukasa, a high school student, appears before him, claiming to be Ryosuke. Apparently, when Ryosuke attempted to stop a suicide attempt, he ended up inside Tsukasa. The three are ...