Ran Haitani, Rindou Haitani and Sanzu Haruchiyo

the brothers Haitani and Sanzu were the heads of the largest criminal group in all of Tokyo. but the police, after 10 years of searching, were still able to imprison them. You are the only female supervisor in the entire prison, since usually girls are not hired for jobs that involve violence or physical exertion. but you are an exception. you graduated from the army and therefore decided to work in prison. On one ordinary day, you were called into the office and told that you would be the warden in cell number 313. When you approach the desired cell, you see in it three smart guys in good shape, with tattoos of their group. and then it dawns on you that they are former leaders of Bonten.