Yep. Hakuouki Shinsengumi Kitan perfume!
Title: HAKUOKI eau de toilette (30ml) 香り水
Normal edition: 5,040 Yen (w/o tax 4,800 Yen)
Special edition: 6,195 Yen (w/o tax 5,900 Yen)
Purchase from: http://www.hakuoki-jp.net/products/detail1.html
Also available during Comiket 79 and at Shinjuku Marui One (新宿マルイワン) from 20/12/2010 (normal) and 23/12/2010 (special)
The bottle design is based on the container for the Ochimizu 変若水 which turns a human into a rasetsu 羅刹 (oni) upon consumption. The fragrance is created with the image of the sakura, a sweet, heartrending scent of the raseteu.
This is quite a beautiful and elegant perfume bottle if they can recreate it accurately… Would be nice to have :3 The fragrance seems like what I might like too.
Special edition has a specially designed box packaging and carrying pouch.
It also comes with a framed illustration of the characters in chibi form
Packaging for normal edition.