Spoilers for multiple arcs, but I'm a bit all over the place. I recommend this on tubi. 
As a participant of the Desire and the Jyamato Grand Prix Michinaga Azuma  faced hurdles as Kamen Rider Buffa.  But Win Hareruya made filling out the paperwork in the Desire Temple  a living hell.  The bearer of the zombie Buckle wanted to preform a double-tap to put the former rock star down for good.   PunkJack insisted on playing his band's final single   just  as everyone began filling out the forms. " You  will be Kamen Riders and you will be paid!" Those where Ace's words but PunkJack parroted them right before the first verse began.   Something that sounded so  good ruined by Win and his music. He didn't understand why it was only  driving him crazy.   He heard how Win  pulled through an explosion and hospitalization kept him from the Grand Prix temporarily. He wished those injuries kept Win away from him for far longer. 

It started with something reasonable Win, asking to be paid for his role in Ace's  new Grand Prix.   Now that he was fully recovered and being part of a staff trying to make a better world instead of entertainment.  Ace wanting to support his friends agreed. understanding the obligations he had to his friends.   Michinaga was part of a construction crew that he was awfuly cold to and his participation and schemes had him missing weeks of work. Keiwa had not gotten any better at job interviews as Sara maintained her office job. The  Star of the Stars of the Stars had the resources to pay them all since he maintained his role as the world's biggest star. Michinaga  when he hated Ace with every fiber of his being, was  once contracted to work on one of Ace's many houses. He wanted to tear that residence down to it's bones when he was stuck there with his crew.

Ace may  have had  the power to recreate the world, but was till figuring out his limits. The power of creation wasn't fully at his fingertips with him fighting back of being a fully fledged creation god like his mother. Ace was starting slow to make a better world, a better way for everyone to be happy and be Kamen Riders if they wanted to.  And he could honestly just transfer funds to their accounts but didn't want things to seem fishy. Having his 'sister' and navigator  Tsumuri hand over the paperwork.  Tsumuri once suffered from Win's flirtatious act  when he was a part of the Girori's  GDP staff.  But currently she seemed to relish in what Win was doing, when he was being genuine. 

"Relax Mister Buffalo. " Sara tried calming his nerves,  trying to act like she was his  big sister. The only thing that upset Sara in the slightest was that Neon wasn't there.  Her enthusiasm and concern would have been reserved for Keiwa but her was actually the stoic one in this situation. He wanted to keep being a Kamen Rider and relieve the burdens of his sister. Keiwa didn't want Sara  to take up another job to help support him as he made being a Kamen Rider his only responsibility.  Ace was happy to help the two of them, especially the Tycoon he knew.  The ninja buckle wielder  only let out a few sounds, clicking his pen. 

Sara's  enthusiasm wasn't infectious something Michinaga knew all too well. And he himself was both of the bearer of the Zombie Buckle and Jyamato  spores stuck in his system. He was too stubborn to die, but that music felt like the death of him. Or the very reason he'd up losing his ID core and buckle again But when he finished and turned in the paperwork he felt relieved until Tsumuri showed the paperwork to Ace and he smirked. Tsumuri put the paperwork back in his hands. " You need to examine what was  was highlighted."  Ace snapped his fingers with a knowing smirk. 

Michinaga couldn't account for what happened next only hearing the aftermath from his friends. Apparently it took nearly all of them to stop him from slamming his head against the closest wall.  With a few adjustments it was sorted out and he left the temple.  And Sara herself decided to pay him a visit wanting to help "Mr Buffalo." It was actually soothing, fun having her around. Though when they crossed paths due to their regular jobs there was a misconception.