Rule34.GG

Copyright undertale
undertale (series)
Character undyne
Regular animal genitalia
animal humanoid
animal penis
anthro
aquatic
aquatic humanoid
athletic
athletic anthro
balls
big penis
biped
blue body
blue nipples
blue scales
blue skin
breasts
digital media (artwork)
erection
fin
fish
fish humanoid
genitals
grey background
gynomorph
hair
humanoid
intersex
lying
moronicpixels
nipples
nude
on side
penis
pixel (artwork)
red hair
scales
sharp teeth
simple background
slim
small waist
smile
solo
teeth
undine
yellow sclera
yellow teeth