The first collaborative work of Seishun Jidai x Pink Family! Delicate and small-breasted Shiraki Lisa takes on her first serious drama role. The tsundere little sister reluctantly agrees to practice sex for the sake of her virgin big brother. What was supposed to be practice turns into multiple orgasms due to her brother's caresses and dick. The motherly love that makes the sister unable to abandon her brother is a must-see.
