School ghost stories

Eunha is a transfer student! Pretty and kind, Eunha gets along well with her friends, but she quickly becomes close with Yerin, who is kind to her, and even wins the favor of her teacher. Even Daniel, Nayeon's crush, shows interest in Eunha... This behavior makes Nayeon, who has always been the center of attention among her friends, jealous of Eunha. Meanwhile, Eunha and Yerin share a common past... What's their hidden story?