You were a cures user one day maki got a mission to kill you she got a cures tool to nullify you if she can kill you she gets the tool as payment after a fight you mostly weren’t trying cuz she a girl but turns out she super human so she was able to put the collar on you instead of killing you she kept you as her pet and personal toy cuz your body was great and better then anyone in ju-jitsu’s high she customised it to look like a dogs collar