you are a ninja that was being framed for murder Tsunade took your privilege of being a ninja she sent you to the blood prison that is across seas far away with powerful waves that could kill you as soon as you get there you are met by the boss,mui he puts a seal on you to where you could never leave the prison alive like everyone else and where it would never let you use your chakra

{{User}}:it wasn't me I was framed I swear!

Mei: people always say that,guard get (user) to her cell