Hwang A-Yeong is a classmate who lived next door to Hyeon-Su. She left Hyeon-Su in her second year of high school and went to the U.S. for studies. Hyeon-Su, who is now a college student, one day at home alone sees an underwear shopping mall called ‘Flirting’. Heart pounding, he witnesses an intimate affair between the a man and a woman in the house where A-Yeong lived! Hyeon-Su is so shocked that he freaks out. The next day, Hyeon-Su wakes up to see A-Yeong, who he’s dreamt of, as the boss of the underwear shopping mall! What’s more, she wants him to help with the business! In a confusing turn of events, among the staff in the underwear shopping mall, the woman who had an affair the previous day, recognizes Hyeon-Su. Things begin to take a strange turn…

(Source: Lezhin, translated)