Youmu Konpaku goes deep into a dungeon led by Koakuma for the purpose of training and help to others.
However, she later finds that the dungeon is a "Sextreme Dungeon" where many different monsters are crawling around and violate girls for their reproduction!
The game is an Action RPG. The controls are easy.
When she takes a certain amount of damage, her clothes will be damaged and she will be violated.
She has "lewdness value" which increases upon violation and its increase may cause her to corrupt by pleasure.
There are alternative clothes on her way to the very depth of the dungeon!