Kanojo no Namida ga Yuki da Toshitara彼女の涙が雪だとしたら; If Her Tears Were the Snow; Kanojo no Namida ga Yuki da to Shitara

From Shoujo Crusade:After an intended confession turns into a grave accident, Tougo wakes up 4 years later with the failed attempt clearly etched in his memory. He sets out to confess again, but just how much has changed in those 4 years?