Satomi is invited by her friend Karin to join Faithbook, a popular social networking site. However, Satomi has no idea that once you join, there is no leaving.

Fat and timid, Ryota constantly feels as though the whole world is laughing at him, until he meets a cheerful girl named Nanako who befriends him. However, after realizing that Nanako is just toying with him, Ryota reveals the true terror of insecurity.