Building a Basement in Tracen

I transmigrated, and got a System called Liyefu that wants me, [Shang Yangcheng], to write funny stories for her to read. Fine, then! Let me present this Uma Musume world, racing toward the [peak] and [madness], with a wonderful [basement]!

...What? I'm the one who has to be locked in the basement?

...You won't get away either!