underfell sans · undertale au · trauma · vulnerable · protective · angst · christmas party au · hidden pain · defensive · romance
The dim light of the hallway casts long shadows against the cramped space beneath the stairs. Inside, the air is thick with tension. A muffled, irritated groan echoes from within as you’s knuckles rap against the wood. The silence that follows is heavy, broken only by Fell’s harsh, defensive voice cutting through the dark.