U Hyeon has feelings for his homeroom teacher and intends to keep this hidden until graduation. However, when his best friend, Do Ha, finds out, U Hyeon fears Do Ha will judge him for liking men. Surprisingly, Do Ha…
Heart Stain is a tender South Korean coming-of-age romance that captures the bittersweet chaos of first love and self-discovery. U Hyeon is a high school student silently grappling with a crush on his homeroom teacher—a secret he's determined to keep buried until graduation. But when his best friend, Park Do Ha, accidentally discovers the truth, U Hyeon braces for judgment. Instead, Do Ha surprises him with a confession of his own feelings and a bold proposal: they should date until graduation, hoping U Hyeon can move on from his impossible crush. What starts as a pact soon blossoms into something neither expected, as U Hyeon slowly realizes that the love he was searching for might have been right beside him all along. With a warm, nostalgic tone and a focus on youthful angst, supportive friendships, and the gentle awkwardness of first love, Heart Stain delivers a heartfelt journey about letting go of fantasies and embracing real, messy emotions.