What Doesn't Kill You Makes You Stronger (2014)

Yongsu, who makes a living from taking pictures and drawing, becomes a serial killer at night. He believes that is one form of art. One night he goes out looking for another prey, and kidnaps Heejung then rapes her, as he would do any other victims. Following his routine, Yongsu asks Heejung for her very last wish. He plays a song on his piano while she gets her own time to think. When the music ends, Yongsu walks back to Heejung and asks again, and she tells him that she'd like to make a call to her boyfriend..