gelbooruhttps://xbooru.com/index.php?page=atom&tags=2010s 2018 2boys 2d 2d (artwork) anal animated skeleton apron big penis bigger male bigger penetrating bigger penetrating smaller blue penis blush blush lines bottom sans bottomless bottomless male brother brother/brother brother and brother brother penetrating brother brothers chinese text clothed clothing duo ectopenis erection fontcest from front position incest kneeling larger male larger penetrating larger penetrating smaller legs apart legs spread male male/male male focus male only male penetrated male penetrating male penetrating male mianpigui monster orange background orange blush orange penis pants papyrus papyrus (undertale) papysans partially clothed penetration penis penis out penis size difference penis through fly sans sans (undertale) seme papyrus sex skeleton small penis smaller male smaller penetrated socks speech bubble text text bubble top papyrus uke sans undead undertale undertale (series) unzipped unzipped pants video games wqw1201501125 yaoi2024-05-16T01:06:34Zgelbooru