Now this story consists of two parts.
Part one - Sum gey figgit wanting his grill back
Part two - A man coming back from his retirement to find a killer who has been hiding in plains sight for 8 years.
As you see one of these storylines has a ahit-ton more interest than the other. But, the other line decides to destroy any suspension of greater evils by pitting the side character Koku against everyone. So, the final reveal at the end of the story has no bang and neither does any opponent he has to compete against. Because we know our "main" character won't fucking die, so why should we worry. This got to the point that I was bored in the final fight. This wasn't a case of cliche foe cliche's sake because we have other anime's where we know the main character isn't gonna die yet the fights are still fun to watch (see jojo's bizarre adventures).
In the end, all that's needed to make this story better is to cut out koku and his side hoes. This would make the reggie somewhat menacing due to the abilities and the finally would actually answers questions then to have it restate shit we already knew.
