From the children's statements
there is a gray-hired cat near the twelfth warehouse
but I can't find it any where
Could anyone tell me where to find the cat
and what will I obtain after I see it ?

I know, it was the girl who told you. It was a joke.

It takes me a lot of time to find the cat .......................

Could you tell me where the kid usually appears that I can trade for "the powder" ?

Depends on what quest you are talking about.

You can also always exchange powders with little white haired girls for ten units - the girls can usually be found in houses in the central and higher parts of the city.

You means that is just a matter of probability ?
What a game.......................

Well, not all the time. I have already guessed that you are talking about the Bachelor, day 1, where he is given the quest to find the powder stash by Lara Ravel. Right? This quest has a fixed location - there are strange ruins near the Theatre - the first house on the same side of the street is the one you need - you will find a powder inside and you can also talk to the doghead-kids.

So~~~~~
The stuff on the table on the 2nd floor is the powder....
Strangely, I can't pick it up before
Thank you