Tajná záležitost byla tajná od přítelkyně - malá nevlastní sestra mé přítelkyně, která je roztomilá, když mě svádí - Ichika Kasagi

Ichika is an honor student and quiet, but she actually loves to do naughty things. The man she falls in love with is her older stepsister's boyfriend... She finally seduces him when she gets to be alone with him on the day before her exam. Her eroticism is a must-see as she presses him in a polite tone of sweetness from start to finish.