Weak as I Am, I'm Forced Into a Love Triangle

When Heaven is about to entrust someone with a great task, it first tests their resolve and strains their body.

So I died at the hands of the person closest to me.

I was born a man, yet possessed a beauty that could make people swoon.

A deranged senior sister, and a powerful fiancee.

How is a weak and helpless me supposed to survive against these powerful women?