Under the cherry blossom tree

The story is about a highschool girl, Kim Ae Rin who was gifted with surprising supernatural abilities which she had been hiding from the mankind until she met Kyou, a boy from her school who shares the same dream of becoming an idol (actor or celebrity). He comes to know about her secret but still accepts her as a friend. He later came to know about an organisation trying to hunt down Ae Rin to sacrifice her in order to awaken the demon of calamity. Their bond grows stronger and stronger with time. Kyou and Ae Rin become best friends or more than that...but are torn apart by a disaster. He realises that there's more to the story than just a girl with psychic powers as he comes across many twists and turns. They cross paths with each other after several years when they had already become successful in their lives. But Kyou seemed to have forgotten her and the disaster that separated them. Why and how did he forget her? Ae Rin befriends him once again and promises herself that she would never remind him of that incident and start anew. But...things didn't go as she wanted them to... "Please...please! Don't... kill him.....!"