Xbooru - 1:1 1:1 aspect ratio 1boy 2020s 2023 2d 2d (artwork) alternate version available animal ears animal tail animated skeleton artist signature bell choker bell collar blue blush blue penis blush bottom sans cat ears cat headband cat tail collar collar and leash collar bell digital media (artwork) ectopenis leash leash and collar leash pull looking away male male focus male only malesub matcha mothh penis penis out pink collar precum sans sans (undertale) shirt up sitting skeleton socks socks on solo male submissive male textless version uke sans undead undertale undertale (series) video games