Shin Chaekyung must accept the punishment of confessing to a senior on the new employee training night. The problem was, the manager she had to confess to was notoriously cold and not interested in women. After successfully confessing, Shin Chaekyung was held back by her manager, Jung Yunu. The manager made an interesting offer, which was for Chaekyung to be his shield at the office. Chaekyung, who is only a new employee, can't just refuse. How will Chaekyung's life be at the office?