Equipped with a Big Bang vibrator inserted into her vagina and another on her clitoris, she experiences intense pleasure so powerful it feels like glass shattering. When she boards the bus and turns the switch on, a distinct buzzing sound fills the air, drawing attention from everyone around. As the pleasure reaches its peak, Riku is left immobilized, her body trembling uncontrollably as if her hips are collapsing. Aroused by her helpless state, she begins squirting uncontrollably, her body convulsing erotically with each wave of sensation. Overwhelmed by relentless climax after climax, she eventually collapses right there on the spot—an intensely moving moment that strikes deep in the chest.