Heart Stain(2025)

Heart Stain is a Korean drama that follows Woo-hyun, a student nursing a secret crush on his homeroom teacher. When his best friend Do-ha discovers the feelings, he takes matters into his own hands and confesses on Woo-hyun's behalf—setting off a chain of awkward and complicated moments. The series explores the tension between youthful infatuation and the boundaries that should exist in a school setting, blending humor with the emotional fallout of an ill-advised confession. As Woo-hyun grapples with the exposure of his private feelings, the drama examines friendship, embarrassment, and the messy reality of unrequited attraction.