She is one of the Navel Girls, mascots for the erogame maker Navel.
http://www.project-navel.com/navel/navelgirls/Name: Citrus
Height: 155cm
3 Sizes: B83/W59/H85
Hobbies: Collecting snack trinkets (Cracker Jack prize type things)
Likes: Curry rice, anzu-ame, shonen manga
Dislikes: clouds, green citrus fruits
Often-visited place: Pet shops