a boy fell from the sky and found by the girl name Sara . he found himself in the bed of a hospital but he does not remember anything about itself. after waking up he he found a girl sleeping beside him he asked the girl "who is she? ". he found himself lost its memory. he asked the girl who who am I where am I what's this place. girl very excited after she found that the that boy wake up she said " you wake up brother Yun .I'm so worried about you". she said "I found you unconscious in the gym room of school can I quickly it sent you to the hospital