Have You Ever Heard of Hidden Skills?

I don't know when an urban legend appeared in Kyushu Spring and Autumn City. There is a bug in this provincial capital called "Hidden Technique". As long as you put some inconspicuous things in daily life into specific arrangements and combinations, unexpected things will happen... For example, as long as you are naked in the abstract high school playground, you have to stand in the center. This is very important! Rotate your arms clockwise to complete a set of house dances, then recite the hero's roll call loudly, and then swallow any insect, and the person will transform into a "card face to fight"... And it is said that there are seven books that collect notes recording these "hidden skills". They seem to have been thrown into the corners of the city by some people with ulterior motives, waiting for curious people to fall into a trap.