Rule 34 Dev - 1boy 2019 2d aged_up anthro anthro_male anthro_only anus arm_warmers armwear asriel_dreemurr ass balls bedroom_eyes boss_monster bovid caprine clothed clothing elbow_gloves erection floppy_ears fur furry furry_male furry_only gloves half-closed_eyes hand_on_thigh handwear horn humanoid humanoid_male humanoid_only kneeling leg_warmers legwear looking_at_viewer looking_back male male_only mammal mammal_humanoid pawpads penis presenting rear_view red_eyes rubber rubber_clothing seductive short_tail simple_background smile solo starrffax topless undertale undertale_(series) video_games white_body white_fur white_tail|3815441024