Anime review Plunderer

Set in a post-apocalyptic world dominated by numbers, every human
being has their worth measured by a special "Count" imprinted
somewhere on their bodies, which defines any number related to an
important aspect of their lives. However, if this Count decreases
to 0, the person will be dragged down into "the abyss", and is said
to be dead for all eternity. For young Hina, her Count corresponds
to how many hundreds of kilometers she has walked. Ever since her
mother was dragged into the abyss, she has been searching for the
Legendary Ace from her mother's last wish for the last five years.
Hina's grueling journey takes a sudden turn when she meets a
strange masked knight known as Licht Bach with a negative-numbered
Count.