Nam Jeong, who enrolls in the Theater and Film department at Hansam University, is secretly in love with Jenny. However, Jenny likes Seon-wook, the leader of the singing club "Crickets." Jenny tries to approach Seon-wook, but his cold reaction hurts her pride and alienates her from her friend Min-ji. With Nam Jeong's help, Jenny passes the preliminary round of the university music festival, but after being eliminated in the finals, she becomes sensitive and treats those around her sharply. Nam Jeong, through Jenny, gives up his thoughts of his brother and decides to sing. Nam Jeong participates in a fundraising concert for children with heart disease, and Jenny watches him with tears welling up. Finally, Jang-ho, who used to intimidate the male students, boards the "Mouse Landing Operation" and departs somewhere.