Secret Senki Stone Buster!

Tatsuhiko, Jun, and Sayoko are a group of three friends who attend private Nagumo High School. One day, the amulet stone that Tatsuhiko bought for Sayoko's birthday was a "power stone" that amplifies "qi" and creates enormous power. However, it soon turns into a terrible fate. In the world of "light" and "darkness", the "Stone Busters", who are hostile to each other, have finally begun a bloody battle for the future of mankind!!