It seems that it takes place in the same world as Kure-nai and some characters from Kure-nai will be in Denpa teki na Kanojo.
Story: The story centers on a belligerent delinquent named JÅ« JÅ«zawa and a strange girl named Ame Ochibana who suddenly vows complete loyalty to him. "Denpa teki na Kanojo" or literally, "electromagnetic girlfriend," refers to the denpa-kei sub-genre of stories imply that bizarre behaviors are caused by electromagnetic waves.