1boy 1girl ahoge ass black_hair blush brown_hair colored_sclera colored_skin cyclops eye_contact flat_chest gazer_(monster_girl_encyclopedia) girl_on_top grey_skin hetero long_hair looking_at_another lying lying_on_person monster monster_girl monster_girl_encyclopedia nose_blush on_back on_stomach one-eyed petite red_eyes rtil second-party_source smile tentacles the_pose yellow_sclera