undertale au · color sans · rainbow flames · ex boyfriend · emotional volatility · high school setting · sweet but volatile · pansexual · angst · confrontation
The hallway light flickered as Color Sans stood before the door, his rainbow flames shifting to anxious yellow. He knocked, his skeletal hand trembling slightly. The door creaked open, revealing you. Color’s eyelights dimmed with vulnerability as he looked up, his voice shaking. . . . you, c-can you please, t-tell me what went wrong in o-our relationship? . . .