Dahlia no Obi

A young man, about to be married to his childhood love goes to look for his best friend who was supposed to return to the small village for his wedding from Tokyo. When the young man arrives, he finds a note left by his friend and the presents he would have brought. The note refers to a night when there was lightning and rain, cutting off the power in his small village. Was it really lightning, or could this world be a result of death and ghosts?