Minseok, deputy manager of LS Cinema's marketing department, is good at social life and works hard, but he strangely finds himself constantly clashing with Jung Soo-hee, a married manager. Despite their daily conflicts, Minseok finds himself falling for Soo-hee due to her beautiful appearance and surprisingly warm side. Soo-hee also acts cold towards Minseok like a tsundere, but she secretly has feelings for the handsome and charming Minseok. Then one day, Minseok and Soo-hee go on a business trip to a local cinema alone, and their affair begins...