Its not bad, its decent to good but pales compare to some of the amazing CG in high quality JP VN. And certainly no where near too good for hentai level which if that's even a thing.
Haven't you ever heard that song Brandy by Looking Glass? It's a classic song and the girl who is the subject of the lyrics is named Brandy. It's totally a girl's name
In this case, you must install the content by choosing the path of the folder that contains the executable of the game, press the button with 3 points, after choosing the correct destination, press the central button at the bottom (next / install), when the process is finished close the window, that's all.
It's true in the broad sense, however no one but igg-games is calling this RPG, especially not the creators. They slap this label on everything like a factory treadmill.
e-hentai link:
g/1928184/5704e29fe3/
he : "YO, WTF"
https://youtu.be/qPge-nxxUhc
https://thumbs.gfycat.com/DesertedCreepyClownanemonefish-max-1mb.gif