An Affair: My Sister-in-law's Love

Eun-joo is a twenty-year-old pre-college student who lives with her sister Eun-hee. Eun-hee is worried about her sister's academics and hires Je-hyuk as her tutor. Eun-joo falls for Je-hyuk as time goes by. They end up making love. A few months later, Eun-joo improves her grades and passes her tests. However, Eun-hee announces that she's getting married to Je-hyuk and Eun-joo doesn't want to lose him...

• 
  Lee Chae-dam

  Eun-joo
• 
  Do Mo-se

  Je-hyuk
• 
  Kim Ji-yeon

  Eun-hee