Goddess Seira has 3 different shoes - sneakers, leather boots, high heels - for ballbusting. Goddess Seira wants to make an experiment to see which shoes give Her slave more pain. Goddess Seira’s slave is not allowed to wiggle his body even though Goddess Seira kicks his balls hard. If he does, Goddess Seira will kick his balls harder and harder. What a cruel ball busting experiment!