The Things I Survived in the Back Room

[Back room theme + first perspective + not brainless + not systematic + not lowering intelligence + not invincible] [This article mainly uses the W version of the back room, and a small amount of content uses the F version] My name is Lin Bo and I am a high school student. One day on the way home from school, I accidentally saw a piece of yellow floor suddenly existing in the middle of the alley, so the ordeal in the back room began... At the end of everything, I returned to my world, my hometown, but... There was no one I knew there anymore.