Good sandbox/simulator game. There's a "story" but everything is unlocked at the beginning and you can go to whatever scene you want. The game itself is short so I would recommend going through story mode first. You do have controls during story mode too (such as visibility of swimsuit or blindfold or changing what blindfold or gag she has). Free play gives you more control on what you want to do.
And as a bonus, the artist has a couple of doujins with a very similar setting (there's also a yuri doujin)
And as a bonus, the artist has a couple of doujins with a very similar setting (there's also a yuri doujin)