Azusa is curious about foreigners and meets a Black man who previously served in the Marine Corps. Eager to experience the difference between sex with Japanese men and others, she quickly initiates contact with him. However, his extremely intense and large-sized cock delivers a far stronger sexual experience than she anticipated, leaving her shocked. Though she feels regret from the overwhelming stimulation, his relentless desire doesn't subside, and he obsessively continues pursuing her young body.