Responses
Yes, it was Takato's wedding. But Aki was there for a job, technically speaking, he was asked to be the photographer for the wedding - at least that was how I read it.
Well his friend asked him to be the photographer. It's still considered a job even as a favor (though they could have paid him too).
i re read this chapiter "finder characters" and i noticed something interesting, I omitted this detail about aki's friend kou and takato, sensei write that takato is getting married in body chase chapiter, i thougt akihito was there for job !