After living in an orphanage, Woo Seul-gi transfers to a top-ranking school, hoping to find her father. Soon after, she catches the eye of a popular student.

Facing a heartbreaking discovery, Seul-gi struggles to adjust to her demanding schoolwork, while her background makes her a target of bullying.

Yoo Jae-i continues to show kindness towards Seul-gi and invites her to her private study space, drawing the two girls closer together.

A furious Choi Kyung becomes suspicious when Jae-i nominates Seul-gi as class monitor; Joo Ye-ri overhears a conversation about Jae-i's former seatmate.

Seul-gi finds details of her family history on Jae-i's phone; Choi Kyung looks into the connection between Seul-gi and Jae-i's pasts.

Students take drastic measures to beat the stress of midterms; Choi Kyung shares a discovery with Seul-gi, causing her to question Jae-i's intentions.