【Kirisaki Shirafox】The Second Layer of Echidna’s Busywork

[Crossbreeding between a monstrous girl and a legendary demon!]

This is the story of a girl who was turned into a monster by a legendary demon [echidna] and spends her days having sex with her brother as she desires.
Frankly, she was disgusted, but even more than that, Echidna couldn’t control her growing lust.

He asks his sister to let him fuck her brother too, but she immediately refuses…