A fierce battle for the BOSS position has suddenly erupted!! Awakening in a world full of unknowns, Arisaki Eri finds herself in a prison that seems to be another world, filled with questions about "this world"... In the midst of this, Eri is pushed up as a new candidate for the prison's boss by Riche, but she soon attracts the attention of other prisoners who are aiming for that position. Just as the information she has been gathering, while hiding the "secret of the boss's murder," is about to connect, a certain memory resurfaces in Eri's mind――. The second volume of the hot topic female prisoner prison survival!