Adult novelist Baekyeon suffers from sociophobia and hasn't left his old decrepit villa for years. The only one who cares for him is his editor Soohyun. One day, the bugs keep appearing inside his home, and Baekyeon has had enought and calls Soohyun for help. Soohyun calls extermination service “BFX.” The exterminator Hyuk, with a tall and muscular physique, shows up and Baek's cold heart is thawed…!