"Marry Me, Mary!', based on a comic of the same name by writer Won Soo-yeon, is a romantic comedy which shows how main female character Mary (Moon Geun-yeong), not at all ready to get married, becomes concerned about the realistic issues and love and marriage, in between two men. Mary, who has suddenly become a married woman because her father forced her into a contractual marriage with the young and wealthy Jungin (Kim Jae-wook), makes things worse by ending up in two marriages by taking a fake marriage photo with indie band vocalist Mugyul (Jang Geun-seok). And she must decide on one after being married to both for 100 days. With the appearance of Seojun (Kim Hyo-jin), Mugyul's former girlfriend and also actress who has signed with Jungin, the four slowly start to get to know each other and love and envy.
