At a prestigious music academy, perfection is expected, and talent alone can make—or break—you. Ha Min-Jae is the academy’s star pianist: flawless, stoic, and untouchable. Kang Seo-Hyun is a new violinist: lively, charming, and utterly unpredictable. When fate—or rather, the academy—pairs them for a high-stakes duet, two very different worlds collide. Min-Jae’s controlled precision meets Seo-Hyun’s playful spontaneity, creating sparks that extend far beyond music. Between hidden vulnerabilities, subtle glances, and unspoken emotions, the line between rivalry and romance blurs. Can Min-Jae learn to open his heart, or will Seo-Hyun’s charm push him to the edge? Moonlight Sonata is a story of music, tension, and the delicate dance of first love—a BL manhwa about finding harmony where you least expect it.