Ame no rūru -the rain song

It's about a girl ,She is about a normal girl, and she has a good reputation, but she will get curse because she rode the bus on a rainy day, and saw a boy that looked at her with magic in his eyes, then the game of rain began. She has to find a different boy with the same magic in his eyes so the game ends, and she must make him fall in love with her or die after one year.