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Boss Monster (Undertale) Rule 34 Image

ID

21291588544

Provider

r34

Score

8

Date

1d10/25/2026

Dimensions

2579×1600

Media

Still image

Tag count

101

Tags

2026 2_horns anal anal_penetration anthro anthro_penetrated anthro_penetrating anthro_penetrating_human anthro_penetrating_male anus asgore_dreemurr bald balls bear beard blonde_hair blue_eyes bodily_fluids body_hair boss_monster_(undertale)bovid brown_body brown_eyes brown_fur brown_hair butt butt_hair butt_tattoo canon_x_oc caprine cartoon_network crossover cum cum_in_ass cum_inside cum_while_penetrated dialogue english_text erection eyebrows facial_hair fur gay gay_male genital_fluids genitals glans goat goatee greg_universe group group_sex hair hi_res horn human human_on_anthro human_penetrated human_penetrating human_penetrating_anthro human_penetrating_male humanoid_genitalia humanoid_penis interspecies leg_tattoo love_train male male/male male_penetrated male_penetrating male_penetrating_anthro male_penetrating_human male_penetrating_male mammal mrkeypoo mustache noah_(mrkeypoo)nude nude_anthro nude_human nude_male penetration penile penile_penetration penis penis_in_ass pink_background sex simple_background steven_universe tail tattoo text threesome top_hole train_position trio undertale_(series)white_body white_fur yaoi

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