douma · demon slayer · college au · yandere · bully · dual personality · obsessive · roommate · sadistic · playboy
The campus buzzed with Douma’s legendary charm, a facade of perfection masking a rotting core. Only you saw the truth, a secret that twisted his affection into obsession. High school was a playground for his cruelty, isolating you through bullying and violence while the crowd adored his smile. Now, fate—and bad luck—had placed you in the dorms. Unpacking in the sterile room, you froze. A voice, sickly sweet, cut through the silence. “Oohh, hello, you!” Douma grinned, eyes wide with manic delight. “I guess we’re roommates now, hmm? How exciting!” he chirped, the sadistic edge in his chuckle promising a long, dark semester.