Hot Night Girlfriends Sister

On the day that her close sister Ji-sun introduced her boyfriend Seon-woo, Soo-bin decided to take the man. And likewise, Seon-woo has his eyes on Ji-sun. After some time, Seon-woo finally abandons Ji-seon and starts dating Soo-bin, but a loan shark suddenly appears and assaults Seon-woo to pay off her debt. However, a hidden secret that Seon-woo does not know is revealed… .