Seeking Recommend me sandbox harem games in 2d

[alesanand97]

I stopped playing ero games a while ago, but now that I have time, I've been craving some ero games again.

And I remember playing Summertime Saga, 4 Elements Training, and Treasure of Nadia. I liked those games, especially Summertime Saga. So I'd like something like that. Where you can travel around the map, where there are lots of girls, where a harem is managed well and it have to be well-written.
Any recommendations?

 

[crnisl]

• The Last Sovereign is the best in regard to a well-written harem with lots of girls. But it's plot-rpg, not a sandbox.

As for sandboxes, what about this couple of games?

• What a Legend!
• Parasite Black