gelbooruhttps://xbooru.com/index.php?page=atom&tags=2010s 2017 2boys 2d 2d (artwork) ahegao anal animated skeleton announcing orgasm blue blush blue tongue blush bottom sans bottomless skirt brother brother/brother brother penetrating brother brothers christmas christmas outfit clothed clothing comic comic page comic panel couch couch sex crossdressing cum digital media (artwork) duo ectopenis ectoplasm ectotongue ejaculation english text fontcest holidays incest interlocked fingers intertwined fingers legwear male male/male male only male penetrated male penetrating male penetrating male merry christmas midriff missionary position monochrome monster orgasm papyrus papyrus (undertale) papysans partially colored red blush red penis sans sans (undertale) santa costume scarf seme papyrus sequence sequential sex skeleton skirt sofa stockings sweat talking tears text thornisicezins tongue top papyrus topwear typo uke sans undead undertale undertale (series) video games yaoi2024-05-09T11:01:09Zgelbooru