18 Year Old Muscle Queen Seong-hye's Sex Scandal

Ji Min is married to Hyeon Soo, a married man with a child. However, Woo Yeoong wasn't Hyeon Soo's own son either. The age difference is so small that she feels uncomfortable in her relationship with Woo Yeong. On the other hand, Woo Yeong falls into a sense of self-doubt that she feels love from Ji Min and that feeling from her mother, but accidentally finds out that she is an adopted child and confesses her heart to Ji Min.
(Source: HanCinema)