"Heyzo-2000 Part 1" refers to the initial installment in the series, which likely sets the tone and introduces the thematic elements that would be explored further in subsequent parts. This part may feature a unique storyline, character development, and visual effects that were cutting-edge at the time of its release. Given the nature of Heyzo's work, "Part 1" could focus on establishing a narrative or stylistic foundation that distinguishes the series from other works in the genre.
For more specific information on the cast or the plot of this particular number, you can usually find detailed descriptions on JAV database sites or the official HEYZO website heyzo heyzo-2000 part1