Cultivation Begins with Pregnancy

After freshman Pan He is struck by lightning, an unknown creature mysteriously appears inside his body. He names it Yingling. As Yingling grows, Pan He's strength gradually increases, and its nourishment turns out to be other people's sincere apologies?

And that's not all. He thought that once Yingling grew up and left him, everything would be fine. But why does it end up clinging to him, traveling from his lower dantian all the way to his upper dantian? A new ability appears each time it reaches a new place, but why does using those abilities require chanting spells?

What exactly is Yingling? Why is the world injured? And who is the real enemy lurking behind the scenes?