Itsuka, Kimi ga Tonari de Mezametaraいつか、キミが隣で目覚めたら (Japanese); If you wake up next to me sometimes (English)

Aizawa Daichi and Hoshiakari Mei are childhood friends, who meet again after 7 years, one of them hides a secret. A story of a boy and a girl who living to the fullest.