Luka is a teenager stuck in a wheelchair, under the care of a laundress mother who barely manages to make ends meet, because the head of the family has long died in a gladiator fight in the arena. The world Luka lives in is cruel. Here rule power and money; authorities are corrupt; the emperor is mired in luxury and pleasures. The country is torn apart by feudal wars, and criminal groups impose their laws on ordinary people. Can someone like Luka survive in such a terrible world? Most likely, no— unless… the hero dies, but a person from another world is inhabiting his body instead, possessing many knowledge and skills—and above all, good control of his own body. With the new master of Luka’s body, the bodily being gains new abilities. And now he won’t just survive—he will try to bring order to this world. The ninety-ninth world for the one who is now called Luka Decisimu.