Shocking 6th installment! When the urge couldn't be stopped and I tried to go in from behind, it turned out to be my girlfriend's sister—a plot that had me glued to the screen. The moment of immediate penetration triggers the little sister's erotic switch, and her desperate craving for the penis is always thrilling to watch. Maï Takeda's performance is outstanding; her face and voice are strikingly similar to a Tokyo Olympics table tennis representative, which initially surprised me, but this resemblance adds a unique charm. Regardless of body type, I can't help but be grateful for this coincidence. The series features four actresses as usual, with both busty and flat-chested options, allowing viewers to choose based on preference. Personally, the little sister's passionate acting shines, and the transition from the shock of immediate penetration to arousal feels natural, making it endlessly rewatchable. Even if you're not a fan, this work is worth a look!