Mebius Gear

Summary

There is a mysterious breed of mechanical creatures, aptly called "Machines," who will, on the condition that their Host never love another person for as long as they live (else the debt will be paid in blood), grant their wielders fortune and prosperity. And where a Host has betrayed his Machine, you are sure to find a member of the mysterious Gari family, wielders and hunters of Machines, in the ensuing carnage… (Source: Turtle Paradise)