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animal_humanoid anus aquatic aquatic_humanoid areola bangs bed bedding bedding_background biped blue_anus blue_areola blue_body blue_breasts blue_nipples blue_vulva bodily_fluids breasts collar covered_eyes ear_fins female fin fish fish_humanoid furniture genitals gesture gills hair hand_gesture harness hi_res humanoid lying mdthetest musk musky_butt nipples on_back on_bed open_mouth pink_tongue red_hair sharp_teeth solo sweat sweatdrop teeth tongue undertale_(series)undyne v_sign vulva yellow_teeth

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Undertale (Series) Rule 34 Image

ID

21315339752

Provider

r34

Score

21

Date

1d10/27/2026

Dimensions

1800×2160

Media

Still image

Tag count

55

Tags

animal_humanoid anus aquatic aquatic_humanoid areola bangs bed bedding bedding_background biped blue_anus blue_areola blue_body blue_breasts blue_nipples blue_vulva bodily_fluids breasts collar covered_eyes ear_fins female fin fish fish_humanoid furniture genitals gesture gills hair hand_gesture harness hi_res humanoid lying mdthetest musk musky_butt nipples on_back on_bed open_mouth pink_tongue red_hair sharp_teeth solo sweat sweatdrop teeth tongue undertale_(series)undyne v_sign vulva yellow_teeth

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