Reincarnated As A Snake

The story about a student named Chizuko Mizuhara who got reincarnated after a big explosion occured during going back home from school with her friends. Unfortunately,they got reincarnated as different species. Some of her classmates are still humans after being reborn,few of them became elves etc. Chizuko had the unluckiest life ever even in her previous life,when she doesn't get along with her classmates often. But as a snake,she changed.She decided to become the strongest creature in the new world.