• unknown artist, mettaton, mettaton ex, sans, undertale, english text, grey background, monochrome, simple background, text, text bubble, 2boys, 2males, animated skeleton, blue blush, blue penis, bottom sans, ectopenis, gay, hooded jacket, hoodie, humanoid, humanoid robot, jacket, looking away, male, male/male, male only, mettasans, monster, penis, robot, robot humanoid, sans (undertale), seme mettaton, shirt lift, shirt pulled up, shirt up, skeleton, small penis, solid color background, sweat, top mettaton, uke sans, undead, undertale (series), yaoi,

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