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21291581872

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2026 anal anal_penetration anthro anthro_penetrating anthro_penetrating_human anthro_penetrating_male asgore_dreemurr balls bear blonde_hair blue_eyes bodily_fluids border boss_monster_(undertale)bovid brown_hair canon_x_oc caprine cartoon_network circumcised crossover dialogue english_text erection eyebrows facial_hair floppy_ears fur gay gay_male genitals goat greg_universe grin group group_sex hair hi_res human human_on_anthro human_penetrated humanoid_genitalia humanoid_penis interspecies male male/male male_penetrated male_penetrating male_penetrating_human male_penetrating_male mammal mrkeypoo noah_(mrkeypoo)nude nude_anthro nude_human nude_male open_mouth oral penetration penile penile_penetration penis penis_in_ass pubes saliva saliva_on_penis sex simple_background smile speech_bubble steven_universe text threesome trio undertale_(series)vein veiny_penis white_body white_border white_fur yaoi yellow_background

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Boss Monster (Undertale) Rule 34 Image

ID

21291581872

Provider

r34

Score

10

Date

1d10/25/2026

Dimensions

2100×1679

Media

Still image

Tag count

84

Tags

2026 anal anal_penetration anthro anthro_penetrating anthro_penetrating_human anthro_penetrating_male asgore_dreemurr balls bear blonde_hair blue_eyes bodily_fluids border boss_monster_(undertale)bovid brown_hair canon_x_oc caprine cartoon_network circumcised crossover dialogue english_text erection eyebrows facial_hair floppy_ears fur gay gay_male genitals goat greg_universe grin group group_sex hair hi_res human human_on_anthro human_penetrated humanoid_genitalia humanoid_penis interspecies male male/male male_penetrated male_penetrating male_penetrating_human male_penetrating_male mammal mrkeypoo noah_(mrkeypoo)nude nude_anthro nude_human nude_male open_mouth oral penetration penile penile_penetration penis penis_in_ass pubes saliva saliva_on_penis sex simple_background smile speech_bubble steven_universe text threesome trio undertale_(series)vein veiny_penis white_body white_border white_fur yaoi yellow_background

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