20-year-old Zhou/Chou Tzuyu has been in the spotlight since she was 15 with an acting career and little time for a romantic relationship. However, when she realised her fans were starting to obsess over her bodyguard she began to feel jealous. 25-year-old Myoui Mina is engaged to a doctor been Tzuyu's bodyguard for 2 years but when things turn wrong in her relationship the one she protects is the one protecting her.