Jirai-kei Netoge Tomodachi to Koibito ni Naru Hanashi

Sequel to FPS no Tomodachi to Real Deau Manga.

M and RR once again go to Akihabara so they can play a new online game title at an internet cafe!
However, right after the meetup RR is suddenly informed of a certain matter by a mysterious character claiming to be M's acquaintance...?

(Source: Melonbooks, translated)

Note: Released as a doujinshi at Comiket 102 and later published by No. 9.