Nature Selects the Fittest

The harem novel is a bit sadistic, but of course not poisonous. I hope everyone will like it. Of course, the author is a novice, so don't criticize her too harshly if she writes poorly. Finally, I hope everyone can like this novel. The title of the novel is taken from the adaptation of natural selection and survival of the fittest. Hahaha, I feel like I'm good at it. I hope there won't be any big problems. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.