She wins a route in Haruka na Sora. She's the first character of the present to admit to having a crush on Haruka, Haruka corresponded her feelings in Haruka na Sora. She fell in love at first sight when she saw Haru.
Kozue fall's in love at the first sight whe she see's Haru, that later corresponded her feelings in Haruka na Sora.
Kozue wons a route in the fandisk.