I Traveled to the Game World and Killed Everyone

I am an otaku who usually likes to stay at home and play games. I have nothing serious to do every day. The first thing I do when I wake up is to get up and turn on the computer to play the games that I have been thinking about. But one day when I woke up, I realized that I might have traveled through time. Looking at the strangely dressed people in front of me, I felt familiar yet a little strange. Wait? Time travel! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.