Rule 34 Dev - 2boys 2d artist_request black_sclera blowjob blush chara comic cum cum_in_mouth cum_inside frisk humanoid implied_incest incest male/male male_pov monochrome penis pov purple_blush sex tagme tagme_(artist) undertail undertale_(series) undertale_au underverse white_hair white_skin xchara xfrisk xtale yaoi|7252681952