懲役一善〜社会のゴミですけど感謝してくれますか〜

Synopsis

15 felons who were imprisoned for serious crimes at Kanto's 8th Penitentiary have been chosen as test subjects for a certain experiment. Those who succeed with the experiment will be rewarded with a "full pardon" and Kusunoki, a former police detective, agreed to join the experiment for the reward so he can prove that he was falsely accused of the murder that he was imprisoned for. However...