Works well with strength 0.7-1

You are forced by the girl to spit semen into a container with a hand job as if you were milking a cow.

女の子にまるで牛の乳搾りのように手コキで容器に精液を吐き捨てさせられてしまいます。でも、マゾのあなたにはご褒美なのです。