: This structure typically signifies a sequel, volume, or chapter in an ongoing indie video series, web series, or artistic project.
It appears that "Milkman Vol2 - shower boys" might be a specific episode or chapter from a manga or comic series. The Japanese manga "Milkman" (ミルクマン) by Nangoku Banana might have a volume 2 that includes a story about "shower boys". Alternatively, it could be a reference to the short film "Shower Boys" which is part of the "Altered Innocence Vol 2" collection. The keyword might also be a misspelling or a combination of different things. Milkman Vol2 - shower boys