Blue Spring X Machine Gun (Oneshot)

From Mangaupdates:
Matsuoka and Yukki were close friends who dreamed of becoming professional soccer players together. But their hopes were dashed when Yukki moved away due to family issues.

Years pass and Matsuoka is now a host while Yukki has become a hentai mangaka. Matsuoka meets Yukki again while the latter is fleeing from his editor, and is soon introduced to his childhood friend's latest obsession...