The Otaku can see ghosts, or so he thinks. After running into seo and dropping his manga, seo (the ghost) follows him home. They start to live together.
From there on the story is about them discovering each others pasts. Otaku-kun is still troubled from the guilt towards his mother, who worked so hard for him to keep him alive. In a fit of anger he said something and she attempted suicide but failed. His mother than moved home and their relationship became strained.
In the meantime Otaku-kun tries to figure out what happend to Seo. But the internet and news don't help him. Than one day he helps his coworker (the girl) with her phone and discovers seos picture. After a fight she tells him, that seo is in a coma and not dead.
Otaku-kun confronts Seo about it and Seo reveals that he remembered his past on the day that Otaku-kun stopped him from leaving at 23:45 to repeat the accident. It is than decided that Seo returns to his body in the hospital, he awakes - but he can't remember the time he spent with Otaku-kun as a ghost. He has deja-vues though, about this times.
Otaku-kun confesses his feelings for seo and wants to tell him a story. the end.
uhhh........i cant understand...i feel like its a good story but.......someone explain me