Mahou Shoujo Pretty☆Bell

A bodybuilder becomes a chosen "magical girl." Fully accepting his destiny to protect little girls from danger, he fights evil by shooting energy beams from his muscles. It's great. Magical rod "ryin rod" has been awakened. When the compatible user "magical girl pretty bell" appears, it is said that the world will be at risk. Milk and Cocoa are angels who protect the rod and support magical girl pretty bell, They have come to the town where a compatible user, Misaki Eri lives, while being attacked by an enemy. However the rod didn't point to Eri but pointed to a body building neighbor, Takada Atsushi. Why did the rod pick Atsushi instead of Eri? And why is it two compatible users?