A youth romance BL drama set in a K-POP idol training center, where trainees must follow one strict rule: no dating. The story explores the conflict between pursuing a dream and following one's heart. Among the trainees competing for debut, Ha Jun, a Korean trainee, reunites with Haruto, a Japanese trainee he once met at the seaside 12 years ago. As their long-forgotten connection resurfaces, their feelings for each other begin to grow again. However, in this training system, falling in love means breaking the rules—and potentially losing the chance to debut. As the competition intensifies, the two must confront a difficult choice between their dreams and their forbidden love.