Pure Yang Heavenly Master: The Ghost Sisters Are Going Wild!

Su Yu transmigrates into a bizarre world and awakens the [Strongest Celestial Master System]. He thinks he's about to take off, but the System only increases his yang energy. As a celestial master, he knows neither the Five Thunder Technique nor sword-flying arts. He doesn't have any magical cultivation artifacts, either. What's the use of just boosting yang energy?! Will he be able to scare bizarre beings to death when he runs into them? Before long, though, Su Yu discovers how to make use of his abundant yang energy. “You've got it all wrong. These female spirits are all like big sisters to me.” Nestled in the arms of a female spirit radiating a terrifying aura, Su Yu speaks with righteous indignation. [PS: Bizarre beings, lighthearted, leveling up, romance, multiple heroines, harem ending.]