Imouto Bitch ni Shiboraretai – Episode 1 (EN)

King's Game with My Little Sister – The Story of an Unexpected King's Game with My Sister at a Mixer Party

The protagonist joins a mixer party invited by a friend, only to find his real little sister Mina already there. To keep the mood light and avoid awkwardness, both siblings agree to pretend they don't know each other. The party quickly turns wild when the group starts playing King's Game. The commands escalate into highly erotic dares: showing off breasts, flashing panties, playing the lewd Pocky game, and even masturbating in front of everyone. Unable to back out without revealing their secret, the brother and sister are forced into increasingly intimate acts. Things reach a boiling point when Mina ends up covered in her real brother's cum — and she can no longer resist taking his cock.