Ga-eun is a junior in college who lives with her younger brother, a senior in high school. Ever since their parents' death, she has tried to stay strong and confident amidst juggling school and raising her brother. And after getting dumped by her boyfriend, dating is the last thing on her mind... until she gets involved with three of her brother’s friends. Which one will she choose? The cheeky, handsome childhood friend Dowan? The calm, collected, and responsible class president Sangu? Or the quiet and intimidating but kind-hearted Jun?