People are collapsing, but Kevin

As a boy of the Kaslana family, Kevin felt a lot of pressure.
First of all, his stupid and unreliable mother Qi Gefei disappeared mysteriously when he was twelve years old, leaving him alone and confused. He wandered around the world looking for her, and finally came to a place where fate intertwined - Changkong City!
Now, after a certain pink fairy lady, he met another mysterious beautiful girl.
What, you said your name is Raiden Mei?
Very good, it seems you are quite good at fighting, come and fight with me first!
In short, it is a huge magical change story of Kevin's version of Bugs ()