Sister-In-Law's Diary (2019)
Original title: 처제의 일기
Sister-In-Law's Diary is a 2019 Korean-language romance movie directed by Jeong Jin-ho, with a running time of 1h 10m. It stars Kim Ji-ah and Sae Bom.
Gong-woo argues with her younger boyfriend, Gyoo-won, and goes to her sister Yeon-woo's honeymoon home. Yeon-woo's husband, Jeong-hoon, prepares some drinks for the sisters. Gong-woo and Jeong-hoon end up seeing each other in their underwear and after getting drunk, they cross the line...