My Roommate Is the Best in the World

He is the best swordsman in the world, and he has traveled through time to become the most feared academic hegemon in society; she is a cute Chinese medicine sister who specializes in treating all kinds of dissatisfaction. In an accident, the ancient ascetic male god Lin Chen broke into Su Qingyuan's rental house. She thinks he doesn't understand modern technology, and he thinks she is weak and helpless and must be protected closely.