Rule 34 Dev - 1girls 2023 2d beambobblox brown_hair female female_frisk female_only frisk frisk_au grey_background human human_female human_only knife looking_at_viewer red_eyes rosy_cheeks small_breasts solo solo_female tagme thick_thighs underswap undertale undertale_(series) undertale_au undertale_fanfiction|8355968320