All things have spirits, and the most powerful and terrifying beings are called demons.
Wen Ting's horoscope is Yin, and Yin evil spirits haunt him like maggots in his tarsus.
He is desperate, but unexpectedly discovers that his weird roommate can suppress evil things. As long as he is close enough, it is not easy to encounter those strange things.
Wen Ting began to endure the discomfort and forced himself to be inseparable from his roommate in order to seek peace.
He didn't know that he was already a sacrifice sent into the mouth of the evil demon.