Xbooru - 00kaori00 2010s 2016 2boys 2d 2d (artwork) animated skeleton bigger male black hair blue eyes blue hoodie blue tongue bottom sans carrying digital media (artwork) duo hair over one eye holding hands holding phone hoodie humanoid robot looking at another looking at viewer making out male male/male male only mettasans mettaton mettaton ex phone pink eyes pink tongue purple hoodie robot robot humanoid saliva string saliva trail sans sans (undertale) seme mettaton skeleton smaller male tongue top mettaton transparent background uke sans undead undertale undertale (series) video game character video games yaoi