Rule 34 Dev - 1boy 1girls alternate_universe blue_body blue_eyes breasts brown_hair cat_be_doing_the_laundry demon_girl ectobody ectobreasts ectobutt fanfiction female frisk heart-shaped_pupils horns human male oral outercourse paizuri penetration rule_63 sans sex skeleton succubus tail text tongue undertale undertale_fanfiction|3957431192