Too much "Ecchi" and not enough plot.
The anime overall is not bad. A classic Isekai with its own rules and peculiarities that are explained to you as you progress through the episodes. The graphic compartment overall is very pleasant.
Sore notes:
1) Too much "Ecchi" which, at one point, felt heavy and boring to me.
2) Given the amount it was better to put "Hentai," being that 8 out of 12 episodes literally have sex scenes but no penetration is shown.
3) I HATED the last episode! In the opening 5 female slaves are shown but during the episodes there is only Roxanne and Seri (only in the second half of 11 and in 12). The 3 missing slaves give you a clip each in the ending of the last episode! I couldn't stand this.
4) Also associated with point 3 I hated the first few minutes of the first episode! They literally show you the main character with the 5 slaves literally 10 years after the start of the anime and that he had a son, so the viewer already knows that for 10 years all the battles he will face he will always come out on top.
I recommend seeing it but not even with too much desire...there are better anime.