Harukanaru Toki no Naka de Maihitoyo Movie

One rainy day, Akane crosses paths with a kind young man who tacitly offers to her his coat. On their second encounter, he confesses that he has no recollection of who he is, his name, or his past, but feels contented by just being with her. Besotted, Akane sets out to find his name and unravel his enigmatic connection with a famous cursed dance rumored to kill anyone who attempts to perform it.