Nampa Beach is a pretty solid management game.
The English version is published by MediBang! under the name of "Let's Turn Pick-Up Beach to a Nudist Fucking Beach!"
As much as I like MediBang, they really need to work on their title localization. That shit is awful.
It's a little bit difficult to explain the mechanics because like any management sim, its all economics. I guess the gist of it is that you have to promote lewd actions on the beach either by spreading the information yourself, or by paying somebody to perform said lewd actions in public. You also have to manage the beach mood, as well as male/female arousal stats. If there is too much of an imbalance in the male and female arousal stats, a rape event can be triggered, which tanks your beach mood and female arousal stats, so you have to keep everything balanced.
For anybody who is uncomfortable, the rape event is a purely mechanical one. There aren't any H-Scenes or other graphic material regarding it.
Also there are 6 women you can romance using a pick-up skills stat. Depending on what is considered acceptable on your beach, you can unlock various animated H-Scenes with them.
I personally found this to be a decent management game, but if you do buy it, temper your expectations a little bit. The game is somewhat rudimentary, and doesn't contain any music as far I'm aware, just SFX.