From the introduction: NaCl, sodium chloride, salt. It is an integral part of our, and every world, this jump is not like the other jumps. You aren't sure how you know this but the knowledge drops into your head. This jump is a punishment. You aren't sure what you did to deserve it but for whatever reason you are stuck here for the next ten years, may Jump Chan have mercy on your soul... ... It's a dreary decade ahead of you, lets see where you wind up, shall we?