Sword Art Online: Hollow Realization Vol. 3 (manga)

Upon encountering their old elven friend Kizmel from Sword Art Online, Kirito and Asuna are sucked into another quest where dark elves and demons abound. After discovering that Silica and Premiere were transferred to the same world, the four decide to head to the quest checkpoint-the Forest of the Holy Tree. With the forest tainted by demon sorcery, the dark elves desperately need the power of the Holy Tree's priestess...And that priestess is Premiere?!