ha-eun, a romance novelist, gets rejected for her adult-themed novel because it sounds more like educational material than anything risqué. feeling unbearable humiliation, ha-eun ends up having a drunken one-night fling with her long-time friend shiwoo. what she thought was just a one-off incident leads to shiwoo's sincere confession… “ha-eun, i really like you! i'd like to have a chance!” “…how many times?” ha-eun and shiwoo end up in a contract romance, where she promises him twenty chances.