Lorne was originally a bartender who was down and out and was bullied.
Accidentally activate the demon contract system, exchanging power at the cost of your soul.
Rescue the escaped cat-eared girl Suzune and start her sailing career.
As the journey unfolds, partners such as the arrogant navigator Aria, the genius doctor Mia, the glamorous cook Caroline, the businessman's daughter Lillian and others board the ship one after another.
They have secrets:
Ling Yin is an exiled fur tribe nobleman.
Alia bears the hatred of genocide,
Caroline's cuisine hides the mystery of the Devil Fruit...
On this route where passion and romance intertwine,
Lorne not only has to fight against the pursuit of the Shichibukai and the Celestial Dragons, but also balances the daily fighting of the crew.
When the price of the contract gradually erodes his soul, he must make a choice between power and bond——
Should he become a cold-blooded devil, or should he protect this group of crew members who are willing to sacrifice everything for him?
[High-burning battle] Awakening of domineering power! Devil Fruit VS The Peak of Swordsmanship!
[Dark Choice] If the soul purity is lower than 50%, it will turn into a demon!
