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Permanent link: /r34/id/21205649848?tags=score%3A%3E3

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Boss Monster (Undertale) Rule 34 Image

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21205649848

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1d10/17/2026

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2026 abstract_background anthro areola arm_hair armpit_hair asgore_dreemurr barazoku beard bedroom_eyes belly biceps big_bulge big_muscles big_penis body_hair border boss_monster_(undertale)bovid bulge caprine chest_hair claws clothed clothing deltoids detailed_bulge erection erection_under_clothing eyebrow_through_hair eyebrows facial_hair front_view fur genital_outline genitals goat hair hand_behind_head heterochromia hi_res horn huge_bulge huge_muscles huge_penis humanoid_genitalia humanoid_penis kemono kneeling long_hair looking_at_viewer male mammal matcharyu musclegut muscular muscular_anthro muscular_male narrowed_eyes navel nipples obliques open_mouth open_smile pecs penis penis_base penis_outline pubes purple_background quads seductive simple_background smile solo thick_arms thick_penis thick_thighs thong topless topless_anthro topless_male translucent translucent_hair triceps tuft undertale_(series)underwear vein veiny_penis white_border yellow_body

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Boss Monster (Undertale) Rule 34 Image

ID

21205649848

Provider

r34

Score

11

Date

1d10/17/2026

Dimensions

1150×1720

Media

Still image

Tag count

92

Tags

2026 abstract_background anthro areola arm_hair armpit_hair asgore_dreemurr barazoku beard bedroom_eyes belly biceps big_bulge big_muscles big_penis body_hair border boss_monster_(undertale)bovid bulge caprine chest_hair claws clothed clothing deltoids detailed_bulge erection erection_under_clothing eyebrow_through_hair eyebrows facial_hair front_view fur genital_outline genitals goat hair hand_behind_head heterochromia hi_res horn huge_bulge huge_muscles huge_penis humanoid_genitalia humanoid_penis kemono kneeling long_hair looking_at_viewer male mammal matcharyu musclegut muscular muscular_anthro muscular_male narrowed_eyes navel nipples obliques open_mouth open_smile pecs penis penis_base penis_outline pubes purple_background quads seductive simple_background smile solo thick_arms thick_penis thick_thighs thong topless topless_anthro topless_male translucent translucent_hair triceps tuft undertale_(series)underwear vein veiny_penis white_border yellow_body

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