Porn Game: NTR Family Final by Zillion

Overview:
The protagonist is a hardworking man living alone.
One day, he clicks on an advertisement for a mysterious app on his smartphone.
Then, through a series of unfortunate events, he loses all his money overnight.
Having lost everything, the protagonist ends up living with his brother's family.
In this desperate situation,
he suddenly looks at his smartphone and realizes that a certain app has been installed without his knowledge.
The app has the ability to affect people's minds.
However, the app is a 30-day trial version, and most of the additional features require payment.
With nothing left to lose, the protagonist decides to make the most of the app in the remaining 30 days.​

NTR Family Final by Zillion game preview

online.