Xbooru - 1:1 1:1 aspect ratio 2010s 2018 2boys 2d 2d (artwork) alternate clothing alternate costume anal animated skeleton big dom big dom small sub big penis bigger dom bigger dom smaller sub bigger penetrating bigger penetrating smaller blue blush blush bottom sans bottomless brother brother/brother brother and brother brother penetrating brother brothers carrying partner clothed couch couch sex crying crying with eyes closed digital media (artwork) door duo ectopenis fontcest hi res high res highres implied bondage incest indoors larger penetrating larger penetrating smaller legs apart legs held open legs spread living room male male only male penetrated male penetrating male penetrating male monster non-consensual noncon nonconsensual nsfwgarbagedump on couch on sofa orange penis papyrus papyrus (undertale) papysans partially clothed penetration penis pixiv id 36285069 rape reverse suspended congress sans sans (undertale) seme papyrus sex sitting sitting on couch sitting on sofa skeleton small sub small sub big dom smaller penetrated smaller sub smaller sub bigger dom socks socks on sofa tears top papyrus uke sans undead undertale undertale (series) video game character video games yandere yandere papyrus yaoi