here is the answer,
it was comic party #27 on 12/06/11
Kaname-sama came to visited the cosplay event.
and Fay-sama was really there too after long time.
I have met some people which I knew in the past
like Koyuki-nee san etc..
Many new cosplayers, worst?
also it was super hot,
I couldn't really stand in the cosplay custom after 5 years.
then I just looking around.
then I went for some shopping past few days.
will updated soon after I get back tomorrow.