Taichi Yamada is an average and lonely boy who falls in love with an idol named Kokoro Shina. One day, there is a DVD promotion and a handshake event with the idol somewhere on the rooftop of a complex. Kokoro falls off the rooftop and onto Taichi, who is on his way to the event. Both of them are hospitalized. Taichi is only slightly injured, but Kokoro goes through surgery. While Taichi is being explained to by a nurse about what happened, Kokoro comes to Taichi's ward room. But she comes through the wall! What happened to her?