Yenni's rich grandmother is shocked at Yenni's running of a loan-sharking scheme in her school, and warns Yenni that if she doesn't stop and marry an honest boy, she will write her out of her will.
The story is about Love Triangle between Yenni (the heroin) with Jay-hee (Yeni's Childhood friend) and In Young (a new boy who suddenly appear to interfere Yeni's plan)