Lee Doo-Na (Bae Suzy) was a member of an idol girl group. She was the main vocalist and the most popular member of the group, but she suddenly announced her retirement. She now stays at a share house, located near a university, and rarely goes out. Meanwhile, Lee Won-Jun (Yang Se-Jong) is a university student. He is a warm-hearted, ordinary young man without anything special in his background. He begins to stay at the share house where Lee Doo-Na resides. His warm heart gives Lee Doo-Na comfort. They get attracted to each other.