Soedara are offering the City Girl mesh camisk in red (to represent the sin 'Lust'). In the box you get an opaque and a transparent version of the camisk in various sizes, plus the accompanying jewelry.
Click through to the hunt page on the Hard Alley blog for previews of almost all the prizes.
Note: You'll have to go to the start location first to grab a hud. Hud and all prizes are free, yay!
The hunt started yesterday, not sure when it ends, so why not get cracking!