When Akuzawa Yugen wakes up in an alternative Tokyo with no other memory than a confusing near-death experience, he would be alone were it not for Utsui Syouma— as the latter tries to kill him, they realise the very peculiar situation they find themselves in : they seem to share physical pain. In a world where even the kindest-looking hide the most cruel intentions ; bound by a mysterious death game ; they might need to play dirty to survive.