Anna Okunaga

The youngest daughter of the Okunaga family. Kanako's little sister. She's also inherited her mother's curious personality and she's very much interested in perverted stuff. Her clear bright eyes are always wandering about. She loves Kanako dearly and she's always giving romance-tips to her hopeless-at-love sister.

(Source: Koiito Kinenbi Melonbooks Special Booklet)