The Grim Reaper, a being said to carry away the souls of the dead and command the boundary between life and death.
Beatrice Nouvell, a candidate to become the next Grim Reaper. While collecting a soul one day, she unexpectedly acquired a mistress from another world.
"Once you put on this collar, you'll no longer be Miss Grim Reaper. Your mistress's attention and affection will become your greatest pleasure. If you don't fall for her, this collar will tighten around your neck and make you suffer terribly..."
"It's not nearly as outrageous as you make it sound!" Beatrice still refused to give in.
Huh? What? Her mistress is actually a hero from another world, reincarnated here on Earth?
No wonder this mistress is such a tease. She's obviously lusting after my body, but she won't admit it!
One day, I'll put this collar around your neck!
