Kang Seulgi, whose childhood name is Kang Rowoon, is a prodigy who has a natural talent in music and arts. As a child, he was always bullied for being weak and was once rescued by a girl named Bae Joohyun. Because of that, they became good friends. They eventually developed feelings for each other, but a misunderstanding occured which made her hate him. Silence was the only response Joohyun was giving Rowoon as he tried his best to talk to her. But by the time Joohyun realized everything, she never saw him again.
Rowoon, together with his mom and dad, got into a fatal car accident. He was the only survivor so Kang Seunghoon, his grandfather, took over the full responsibility to look after him. The poor child was only 9 years old at that time. Rowoon was sent to US, provided with everything by his grandfather so he could move on from all the unpleasant things that happened.
Fast forward to high school, Joohyun, now known as Irene, became the most popular girl in school. Possessing an ethereal beauty, amusing personality, and outstanding IQ, it's unbelievable that such a person could exist. Despite having all the boys falling in line to woo her, only one stood a chance. Well, that's what everyone has thought. His name is Park Bogum. But still, her world took a 360-degree turn when the only boy she ever liked unexpectedly comes into her life once again—except he goes by Kang Seulgi now, and it is not his name alone that has gone through a drastic change.