Kim Si-eun

A karaoke in a rural town called "Karaoke Crazies" is run by Sung-wook. Business is slow and when Sung-wook posts karaoke singing along job to boost sales, a girl in early 20's, Ha-suk comes along. She's hopeless game addict and lack of talent but soon she starts to use a special tactic to lure customers in. Just when they are ready to come out of shade, little do they know that a serial killer on the loose in town is after something in the karaoke (imdb)

High school student Sohee starts job training at a call center, but she faces pressure of greedy company which leads to her death. Detective Oh Yu-jin, who has something in common with Sohee starts to follow traces to reveal the truth. - IMDb

On the day before the school trip, Sam dreams an ominous dream of her best friend Ha-eun dying. Filled with fear, Sam runs to Ha-eun, who's in the hospital because of the recent bicycle accident, and asks her to come for the school trip with her. (letterboxd.com)

Set during the era when Korea was under Japanese occupation. Shin-Deuk is the daughter of a poor noble family. She married Jong-Suk at a young age. Her in-laws, who are pro-Japanese, are rich. Her marriage life doesn't go well. Jong-Suk does not like his wife at all. In order to make Jong-Suk like her, Shin-Deuk decides to attend school. There, she falls in love with Woo-Jin. He is a teacher at the school. Shin-Deuk is in love for the first time in her life, but she has a rival.