(Partial Synopsis)

Set in contemporary Korea, the musical unfolds in a coastal town, where a chance encounter between two teenagers blossoms into a fleeting but luminous first love.

Haram, a carefree boy who enjoys surfing under the bright sun, meets Haena, a girl who sings and plays guitar only at night. Their meeting begins with a bold confession from Haena, who has secretly been watching him, and soon develops into a tender relationship.

Unaware of Haena’s condition, Haram spends joyful nights with her, cherishing their growing connection. However, Haena suffers from a rare illness that prevents her from being exposed to sunlight, forcing her to live in isolation from the daytime world.

As her condition worsens, Haena makes the painful decision to leave Haram, choosing to protect him from the reality of her illness. Their love, though brief, becomes a lasting and radiant memory.