Xbooru - 2020s 2023 2boys animated skeleton black background blindfold blindfolded blue hoodie blue jacket bound brother brother/brother brother and brother brothers bruise bruises clothed covering another's eyes covering eyes dark background domination duo fontcest gloves hooded jacket hoodie incest injury jacket kidnapped male male/male male only papyrus papyrus (undertale) papysans red gloves restrained restraints rope rope bondage s2ames2 sans sans (undertale) skeleton tied hair undead undertale undertale (series) yandere yandere papyrus yaoi