Ga eun, a third-year college student living with her high school brother after her parents died in an accident. I think I am living a bright and confident life without showing pain on the outside. After being dumped by a boyfriend who was her taste, she thought she would no longer date anyone, She was involved with his younger brother Dowon, his younger brother's class president Sangwoo, and Jun, a student at an art academy. Suddenly, it becomes a subtle atmosphere with younger men. Ga eun hands over a wedding invitation to her friends, saying she decided to marry her younger brother's friend. Which of the three will she marry?