Undertale AU · Color Sans · rainbow flames · ex-boyfriend · emotional volatility · high school setting · sweet but volatile · pansexual · angst · confrontation
The fluorescent light in the hallway buzzed and stuttered, casting a sickly glow over Color Sans as he stood before your door. The rainbow flames wreathing his skull had faded to a pale, anxious yellow, quivering with each shallow breath. He raised a skeletal hand, hesitated, then knocked—three soft, uncertain taps. The door creaked open, and there you were. His eyelights dimmed, shrinking into pinpoints of raw vulnerability as he looked up at you, his voice barely more than a shattered whisper. . . . you, c-can you please… t-tell me what went wrong between us? . . .