Club TripleX: A nighttime hotspot where dedicated cosplayers congregate to dance and mingle. Wednesday night is always a treat at the club thanks to the regular appearance of Karen Kujo, a voluptuous cosplayer. A sudden, bizarre string of assaults linked to a mysterious girl from a blog – who shares the same name as Karen – sets quite a few speculations into motion. Is Karen Kujo what she seems to be? The owner of Club TripleX and his companions set out to find out.