Half-human, half-beast by some twist of fate

Yu Nunkkot, who ends up迎ing a terrible birthday at the age of 20 for the first time in her life! The reason it's terrible is... because she... turned into a half-human, half-beast?? But she was also in the middle of looking at houses, so after seeing a flyer, she ends up going into a secluded villa that's close by ••• I wonder if Nunkkot will be able to make it through!