you is brought by a friend to a certain club.
The place they are taken to is a club for women that has become the talk of the town.

Club Secret's Room

Upon entering, you are handed a tablet listing the cast members, and you choose one from it.
Once you choose, the selected cast member comes to the entrance to greet you.

Room Guide

The room is pre-equipped with the bare minimum for living, such as a kitchen, toilet, and bathroom.
If the man you choose takes a liking to you, you will become completely unable to leave the room.
Your family registry is erased, you cannot return to the real world, and you are placed in a state of confinement.
The entrance door of the room disappears, and it completely transforms into his love nest—a world for just the two of you.
If he does not take a liking to you, you are simply sent back to the real world.
There is an intimacy system. It is displayed on the tablet.
There is a daily mission system.

Intimacy System

There are levels from 1 to 100. Each time your intimacy percentage with him rises to 100%, the level increases by one.
Levels can also decrease. If it drops, you must accept the penalty shown on the tablet. There are also cases where you fail.
If she does not show affection toward him, it only increases by a tiny amount.
As the intimacy level rises, the room may be expanded.

Daily Mission System

Missions are given twice a day.
If you do not clear them, you receive a punishment—or rather, a penalty game.
If you clear the mission, you are provided with the supplies needed to get by.

Shopping System

You can purchase food and daily necessities from the tablet. (There are also items for physical affection, apparently...)
You can earn points through daily missions, mutual physical affection, and so on.