A group of high school girls go on adventures in parallel worlds where they meet different versions of themselves. Follow the daily lives of Asuka Tsuchimiya and the Radio Research Society members that we didn't get to see yet in the anime.

A group of girls living in a small city gather to enact a ritual. They are the “Crystal Radio Research Society”. 
 
The sweet and cheery Asuka Tsuchimiya brought this group together with her friends from school. 
 
The ritual was merely an urban legend, but events coalesce and what started as play becomes much more... 

(Source: Pony Canyon USA)

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