The First Love That Became My Sister-in-law (2018)
Original title: 내 처제가 된 첫사랑
The First Love That Became My Sister-in-law is a 2018 Korean-language movie directed by Kim Yi-seul, with a running time of 1h. It stars Park Joo-bin and Ah Ri.
Hyun-a likes Young-joon, her tutoring teacher. Young-joon also likes Hyuna, but because of the relationship between a teacher and a student, she tries to hide her heart. As time goes by, Young-joon falls in love with Hyun-a's older sister, Min-a, Visits home to greet her family. And, her younger brother Hyuna! They are confused by an unexpected reunion.