Mahou Shoujo Madoka Magica dj - Kaketa Ringo no Yume o Miru

Pairing: Kyouko x Sayaka

From Frostoria:

In this perfect world where she fights Nightmares with her friends and lives with Sayaka, Kyoko still can't shake the feeling that everything is not as it seems. Why does she dream of an apple that tastes of nothing?