At the Beginning, He Forcefully Kissed the School Beauty, but He Didn't Know That the World Was Alienated

The male protagonist had a dream, going back to his senior year in high school, where he forcefully kissed the school beauty at the beginning. Who knows that this is not a dream, but that he has traveled back in time, but the world is sick. Someone will turn into a slit monster just to steal socks. Some people like to walk backwards and their faces become mushy. There are also cockroach monsters as big as humans. He found that everyone he knew had changed, and a good person became crazy and sick. Someone asked him: Why are you not sick? Let's get sick together, shall we?