Hitomi ga Kasanaru Zero Senchi

Shuu, a popular video game player, is a gay man who hides insecurities behind his confident persona. When he is contacted by his favorite game creator, known only as “unknown,” about a collaboration project, he eagerly agrees to meet in person. Despite being the complete opposite of his usual type, Shuu finds an unexpected connection with him. They quickly hit it off, leading to an invitation to each other’s homes, even though it's their first meeting.

(Source: Takeshobo, translated)

Note: Includes one extra chapter.