My boyfriend is Septin!

Yeoju's parents died in a car accident when she was young, leaving her depressed. While depressed, she meets Ga-eun in elementary school and becomes a fan of Seventeen, the same group Ga-eun is also a fan of. Simultaneously, her classmate ?? approaches Yeoju, who is feeling depressed, and she falls for him. She confesses her love, and ?? accepts. Yeoju has three older brothers and one older sister.