Online Games: a Worm at the Beginning and a Dragon at the End

You start with a Kun, and your evolution depends entirely on swallowing. The school beauty is mine, but my love rival is under my feet. I am Shen Kun. I didn't expect that as a spare tire, I could also dominate a different world. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.