I Woke up as a Mob in a High School Setting with a Harem Protagonist

After an unfortunate yet preventable "accident", I woke up in an alternate world where I am in a Harem Romance Slice of Life School Light Novel/Manga. A story of how I turned into a mob as I interacted with this story's MC and his harem. I totally hope I didn't destroy the sequence of the story. Or did I? Join Haruto...