Ma'am, it's on SALE!

JIN-HONG, who started working part-time at a mart, experiences a strange happening from his first day of work with his co-worker, "JIN-KYUNG." Since then, JIN-HONG, who keeps thinking about the day, keeps making mistakes and JIN-KYUNG, who sees it, calls him to her house... We need to be quiet so that my baby doesn't wake up... But I can't stand it anymore, JIN-HONG."