Mechanical Gods' War Gigantic Formula, also known as Apo Mekhanes Theos Gigantic Formula, is a Japanese anime series that aired in Japan. The show was first aired April 4, 2007 by TV Tokyo, and ended its run on September 26, 2007. A manga adaptation by Shōhei Oka was serialized concurrently in Dengeki Daioh.

Hibiki and Kanade are two friends who grew up together in Kanon Town. Very different in their personalities, they share one thing in common: A connection to music. No matter how different they are or how much their differences cause them to quarrel, they both continue to share loving hearts. One day they meet Hummy, who is sent to the Human World from Major Land to collect the scattered notes of the Melody of Happiness. They have to instantly transform into Pretty Cures to resist the threats and evil music from Mephisto. Can they stop the Melody of Sorrow from disrupting their peaceful town, and can their warped friendship measure up to the bonds of Pretty Cure?

An art student named Jin Mikuriya carves a statue from the wood of the Kannagi tree only to have the statue come to life in the form of a goddess, who has now taken over the statue. He and "Nagi" work together to destroy the impurities that are gathering in the town.