Xbooru - 13thcatofthegate 2010s 2019 2boys 2d 2d (artwork) animated skeleton big dom small sub bigger dom bigger dom smaller sub bigger penetrating bigger penetrating smaller blue body blue tongue boots bottom sans brother/brother brother and brother brother penetrating brother brothers cuddle digital media (artwork) duo ectobody ectotongue fontcest from front position gay gloves glowing eye hugging incest larger penetrating larger penetrating smaller male male/male male only male penetrated male penetrating male penetrating male multiple views orange body orange tongue papyrus papyrus (undertale) papysans penetration red boots red gloves sans sans (undertale) seme papyrus skeleton smaller penetrated smaller sub smaller sub bigger dom tears tongue tongue out top papyrus uke sans undead undertale undertale (series) video game character video games white background yaoi