Gabimaru the Empty, a former ninja assassin known feared as a heartless husk of a man, spends his days on death row wondering when an executioner skilled enough to so much as harm him will arrive, as he thinks nothing of seeing an end to his meaningless existence... Or so he thought. Then the lady executioner, Asaemon the Beheader, rekindles his hope with an astounding proposition. If he ever wishes to see his beloved wife again, he is, under the auspices of the shogunate, to embark on a perilous voyage to the mysterious mystic island said to house the elixir of immortality. Should he be the one among many rival death-row fiends and scoundrels to find the elixir, he'll earn a full exoneration, and, more importantly, a chance at an ordinary married life with the light of his life--the woman who made the world seem not so ugly. What awaits them is a journey like no other!

After the assassination of the powerful Godfather, Don Pazolini, the world has been thrown into chaos. Many mafia try to fill the power vacuum, but there is a rumor that Don Pazolini's son is hidden away somewhere. That son is Nero, an orphan who is raised in a bar with showgirls as his friends. He dreams of one day finding his parents, but he doesn't know who they are. One day, he encounters a haunted baseball bat, who names himself "Pucchi" and refers to himself as the Pazolini family 'fantasma.' Pucchi insists that Nero come with him to become the new Godfather and rebuild the Pazolini mafia family. Nero is reluctant, but quickly realizes he has no choice, since there is a price on his head and his identity is no longer much of a secret...
(Source: MangaHelpers)

The demonic overlord has been revived, and kidnapped the beautiful Princess Sina. An army of the world's finest knights has been sent to his castle to rescue her, but Sina refuses to be a mere damsel in distress and decides to break free on her own.

Gabimaru the Empty, a former ninja assassin known feared as a heartless husk of a man, spends his days on death row wondering when an executioner skilled enough to so much as harm him will arrive, as he thinks nothing of seeing an end to his meaningless existence... Or so he thought. Then the lady executioner, Asaemon the Beheader, rekindles his hope with an astounding proposition. If he ever wishes to see his beloved wife again, he is, under the auspices of the shogunate, to embark on a perilous voyage to the mysterious mystic island said to house the elixir of immortality. Should he be the one among many rival death-row fiends and scoundrels to find the elixir, he'll earn a full exoneration, and, more importantly, a chance at an ordinary married life with the light of his life--the woman who made the world seem not so ugly. What awaits them is a journey like no other!