Haruka visited Mariko, whose palm was painfully injured. Haruka slowly licked Mariko's sore fingers. Despite wincing in pain, Mariko inserted those fingers into her own vagina, stimulating herself to climax. This act of masturbation using someone else's fingers vividly conveys the sensation of her vaginal walls being twisted and stirred, triggering intense pleasure through direct G-spot stimulation. The scene simultaneously excites both physical pleasure and psychological arousal.