When Reborn shoots him with the Vongola Family's Dying Will Bullet he comes back as a powerful wielding berserker whose goal is to act on what he had regretted to make it right whenever shot by this special bullet. However, if he does not regret anything when shot, he will die. Ironically, Tsuna's friends tend to remain amazed by Tsuna's actions in such mode, causing several people to be interested in his skills. He also manages to befriend Kyoko, which makes him very happy. Tsuna finds himself thrust into the mob life that is his future and begins to meet not only his friends and future family members but also the challenges that his new life holds.
