Sono Seiren naru Tsubuyaki wo

Maki is having a difficult winter since he has moved to a town that is prone to snowfalls. During one of his usual falls, he meets a young, sad man, Kotaki, who always places flowers near the train station. One evening, Maki hears Kotaki say "One More Day". What does this mean? Can Maki do anything to help?
(Source: MangaUpdates)