Satoru has been walking around his apartment for hours. It was today, almost more than 10 years ago, that he left. That he left him and his heart in pieces, swept away all their memories. He dreams of going back in time, of telling him while it was still possible that he loved him, madly.

He drops his head against his desk, tired of his regrets. Suddenly, someone knocks on the door.

Who is it ?