[Semimogura (Yoshiie)] Iinari Imouto Onahole

A headstrong younger sister finds herself in a submissive role, transformed into a devoted pet-like companion. As she adopts a canine-like persona complete with a wagging tail plug, her brother takes charge, guiding her through intense sessions of physical discipline and play. The tension rises as she struggles to remain a 'good girl' while yielding to his overwhelming presence, her body reacting viscerally to every touch and command.