Yakko has always felt inferior while living under the immense shadow of her younger sister, Yuno. However, on her seventeenth birthday, popular actor Araki Shigaraki unexpectedly declares his love for her. Initially, Yakko assumes he's professing his love for Yuno, but to her surprise, he further confesses his love for her. Despite his repeated expression of feelings, Yakko remains skeptical of his intentions. Nonetheless, Araki refuses to give up; if Yakko won't reciprocate his love, he'd settle for being her pet instead.