Mary Stayed Out All Night - Season 1 Episode 13
- Genre: Comedy, Drama
- Studio: KBS2
- Keyword: love triangle, friendship, romantic comedy, romance, pretend relationship, based on webcomic or webtoon, based on manhwa
- Cast: Moon Geun-young, Jang Keun-suk, Kim Jae-wook, Kim Hyo-jin, Kim Min-gyu, Park Jun-gyu