<SOUR> delves into the intersection of love, delusion, and growth, set against the passionate world of K-pop fandom. It explores how intense devotion can blur the line between reality and fantasy, leading to both connection and heartbreak. At its core, the narrative reflects on the fleeting nature of love—how, even when the illusions fade and the love is gone, the lessons and self-discoveries we gain through that experience remain with us forever. It’s a bittersweet exploration of how delusion and love can coexist, leaving behind something meaningful despite their impermanence.