Durak NTR: the Fool who lost his gf in a card game

The male protagonist is into the female lead but can't muster the courage to speak up.
After finally managing to set up a date with her at an izakaya, he still can't find the bravery to confess.
Unable to bear it any longer, the female lead, Mizuki, suggesting they go a sex club together?!

Kai Forester wakes in prison with his mind scrubbed of all memories of a past life. Against his will, he is thrust into the ranks of a card game tournament where losing mean being brutally beaten to death. Should Kai prevail, and defeat Sadista’s champion, he can leave the prison walls forever to make a new life. But when the inmates of the Sadista will use whatever tactics necessary to win, Kai’s future becomes as uncertain as his past.
 
Strip Card Duel is an RPG game with a plot that escalates with every battle. Players will use cards to duel, battle their way through dungeons, and strip cute girls.
 
There are many cards to collect, companions to befriend, and combat skills to develop. Play the game your way. The Bosses that lurk in the prison’s dungeons are challenging to beat and can’t be overcome by spamming skills. The overall game time is around of 5-6 hours, with 2 possible ending.

A simulation game where you seduce married women and their daughters!
Use a mysterious app installed on your smartphone to corrupt the hearts of the heroines!
This game features pure heroines who gradually become accustomed to erotic activities and succumb to pleasure.
This is a seduction simulation game that maximizes the gradual corruption of the heroines.

A simulation game where you can steal university students, wives, and girlfriends!
 
The main character, a former teacher, was working part-time and struggling to make ends meet when he decided to become a tutor. His first students are his relatives and neighbors.
 
The main character's niece and first student. Her grades aren't very good, so her father sent her to Hiroshi so that he could tutor her.
 
The neighbor's only daughter, and is currently dating Hiroshi's son. Despite knowing her for a long time, Hiroshi still feels intimidated by how pretty she is.
Will he be able to resist her beauty?
 
Kaede's mother and a housewife. She has a rather withdrawn personality but is well known in the neighborhood for her beauty. Recently, she has been feeling frustrated because her husband has not been giving her enough attention. Will Hiroshi be able to comfort this lonely wife?
 
A university student. She moved in with her boyfriend about a year ago, as her university is located not too far from the neighborhood. Has been having trouble with her assignments lately.
Is this the perfect opportunity for Hiroshi to have his fun with this busty student?
 
Kaede's classmate and best friend. She has a crush on a teacher and is often seen with him. Will Hiroshi be able to put a stop to this scandalous relationship?

Life is good right now; you are enjoying your days playing VRMMORPG with your girlfriend and going to dates with her. One day, however, you met Inoda, the owner of the rare “Stealth Veil” skill that has the massive drawback of heavily weakening his character in the VRMMORPG you are playing.
 
You and your girlfriend decided to help him out, but that decision would soon turn sour as Inoda slowly encroaches into your daily life…