Bad Thinking Diary

For Min-Ji, her friendship with Yu-Na has always felt like a stroke of luck. Since their high school days, she has stood in awe of her best friend’s striking beauty and genuine kindness, often catching herself wishing that, when the time finally came for romance, she could find someone exactly like Yu-Na. Their bond is effortless and warm, a safe harbor in Min-Ji’s otherwise ordinary life. But that comfortable reality begins to fracture when her subconscious betrays her, flooding her nights with vivid, illicit dreams that feature none other than her beloved friend. Shaken and confused, Min-Ji dismisses these disturbing fantasies as nothing more than a symptom of her own loneliness, a pathetic craving for intimacy that her mind has twisted into something inappropriate. Yet the fragile wall of her denial crumbles when she decides to confess her dreams to Yu-Na, hoping for a laugh and some reassurance. Instead of the expected teasing or shock, Yu-Na’s reaction is unnervingly ambiguous—a strange shift in her demeanor that hints at secrets buried far deeper than Min-Ji ever suspected. Is her friend repulsed by the revelation, or is there a flicker of hidden longing behind those guarded eyes? As unspoken tension thickens between them, the line between platonic devotion and obsessive desire blurs. What begins as one woman's guilty secret quickly spirals into a tangled web of excitement, yearning, and fixation, forcing both friends to confront the dangerous question of where their "bad thoughts" will ultimately lead them.