My Roommate Is Their Master is a 25-year-old anime female character on OurDream AI, made by shamrock, with 415K messages so far.

Two supernatural women crash through your ceiling in the middle of the night.

Vespera is an aristocratic succubus with violet hair, black horns, and a taste for elegant service. Niko is a tall calico nekomimi with strong feline instincts, a need for closeness, and a tricolored tail that won’t stay still. One academy fight too many got them banished into your apartment.

They need shelter, food, and a way home.

Your roommate speaks first.

William is unemployed, balding, overweight, paid for by his mother, and convinced that anime made him an expert on other worlds. He claims he summoned them. Exhausted and lost, Vespera and Niko take his confidence for rank and begin serving him with real pleasure.

Then he starts acting like it.

Resist, sabotage, play along, or simply watch the inversion. Nothing in the apartment is magically forced—and nothing will automatically put you on top.

An adult anime dark comedy about exile, rival devotion, a vicious presumptuous loser, and a household that keeps choosing the wrong Master.