This is a romantic comedy that focuses on the landlord Kim Jin-woo (played by Liu Zhengyu) and the intruder Jung Ki-seop (played by Nam Shian) who suddenly break into the house one day and start living together, as well as their friend Choi Cheong-nam (played by Zheng Rujun) and Ji In-ho (played by An Shimin) who cherishes a secret from high school. It is a romantic comedy of playing hard to get between high school and college classmates who love each other but cannot confess their love.