Another World, Dragons, and Spirit Lords

I somehow transmigrated into a world of psychic powers, with dragons, master-servant contracts, and, most importantly, Super Perfect-level transformations. That's how it is.

Oh, right, and the protagonist is a spirit master.

"I really want to possess the girl in the mirror..."

"Huh? Wait, that's me??"

"Then I absolutely can't let some other guy possess me! My sexual orientation has to follow my soul, no matter what!"

Life is short, **, girl.