undertale, digital media (artwork), simple background, ambiguous gender, animated skeleton, bodily fluids, bone, bottomwear, clothed, clothing, dragon, duo, erection, fellatio, gaster blaster, genitals, glowing, glowing eyes, glowing genitalia, glowing penis, glowing tongue, handwear, humanoid, looking at viewer, looking back, magic, male, male/ambiguous, male/male, mittens, not furry, oral, penile, penis, sans (undertale), sex, sirtoasterbutt, skeleton, skull, skull head, smile, smiling at viewer, smirk, smirking at viewer, teeth, tongue, tongue out, topwear, undead, undertale (series),

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