A Yu's friends all like to play King of Chicken Onmyoji, but the only games on A Yu's mobile phone are Frog Travel to collect postcards, Cat Backyard to collect cats, and various development and collection games to collect Showa era items like mushroom collecting.
One day, Ayu said to himself, it would be great if he could collect and develop things in the real world.
So God heard her voice and sent her to a different world called Yunfu.
In that different world, God has just disappeared, but God left some power contained in power balls. You can get different powers by collecting these various balls. A Yu diligently collected a lot of power balls, and in the end he accidentally transformed from a fat nerd into the person with the most power balls in the world.
But the power balls were almost collected, and Ayu felt that he had nothing to collect and his life was very boring.
Later, Ayu also discovered that mythical beasts can actually be collected? !