For ten years, Seojun has harbored a silent, unrequited crush on his best friend, Jaeyun. But when Jaeyun asks for a favor, Seojun finds himself sharing a roof with his friend’s younger brother, Doyun. Living together reveals a different side of the family: while Doyun is quiet and unexpectedly tender, Jaeyun’s perfect facade begins to crumble. Caught between a decade of devotion and a new, grounding confession, Seojun must finally decide which brother holds the key to his heart.