【Kirisaki Shirafox】The Seventh Layer of Master Echidna’s Busywork

[Mating with your sister?] My sister was turned into a demon by a certain necklace. The story is based on the story of a young girl who was born in a small town in Japan. However, the unexpected and shocking change did not change her brother’s love for her. The older sister is pessimistic about her brother’s appearance, but she can’t control the lust in her body and takes action to confirm his love.