The FMC is a closet otaku who likes gaming. She hides the fact that she likes gaming since in her past she was made fun of for it.
The MMC is a gamer who also happens to be co-workers and sits next to the FMC.
They both find out that they're both gamers at a gaming tournament. After finding out, they both decide to play together, and soon start to like each other.
Chiguhagu na Karera no Koi no Yukue