Covet Your Brother-in-law

I want to steal them all! Haru, who ran away from her mother while having sex with her boyfriend (Jin Sang), runs away to her older sister Yu-hee's house and sits down. Yoo-hee also lives with her boyfriend In-gyu's house and lives together with her ... In fact, Haru has had a crush on In-gyu, who had been her teacher training since high school. She still has only In-gyu in her heart ... She seduces In-gyu from her older sister, and asks her to seduce her older sister, Yu-hee, to have sex with her, etc. can't act The reason her day is ending like this is to forget her painful past when she was gang-raped by her peers because her promises with In-gyu were mixed in high school. Who will In-gyu choose between Haru and Yu-hee...? Her sister's secret report, which seems to be her recklessness but bears her pain.