This book is a rebirth system flow, a harem flow, but it will not be a random stud, and the protagonist will not be invincible at birth or in his teens.
Some places will follow the original work, but there are many places that will not follow the original work.
The author here guarantees that there will be no eunuchs!
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.