Echika's ETICA

You’re invited by your junior in the board game club, Echika, to play a naughty card game called “Echika.”
The rules of the game are super simple!
The winning condition for this card game is to “make your opponent climax!”
There’s stripping, touching and being touched in various body parts, and even… penetration!
Echika, who loves games and hates to lose, will do everything in her power to make you ejaculate in order to win.
You too must withstand Echika’s erotic attacks and try your best to make her climax!