Xbooru - 2010s 2016 2boys animated skeleton artist signature bigger dom bigger dom smaller sub bigger male biting blue blush blue hoodie blue jacket blush blush lines bottom sans brother brother/brother brother and brother brothers clothed fangs fontcest fully clothed gloves gradient background hooded jacket hoodie imminent rape imminent sex incest jacket larger male male male/male male only non-con non-consensual noncon nonconsensual off shoulder one eye closed papyrus papyrus (undertale) papysans red gloves sans sans (undertale) segamew seme papyrus skeleton small sub small sub big dom smaller sub smaller sub bigger dom sweat top papyrus uke sans undead undertale undertale (series) yaoi