The process by which unrequited love becomes mutual

Jimin, who was just an innocent classmate, became the object of the female protagonist's unrequited love just by making eye contact while laughing and smiling while talking with his friends?! The female protagonist who is openly in love with him and Jimin, a timid person who doesn't even know that he likes him even though he is openly in love with him! Can the female protagonist's unrequited love really be mutual..?