Zero no Tsukaima -Muma ga Tsumugu Yokaze no Fantasy-

Saito gradually gets used to the life in the another world. But he has a strange dream every night. That is about his life in the world he used to belong, enjoying his school life with Louise and Siesta. When he wakes up, he is still in the another world.... One day, a treasure storage box is broken by Louise's poorly used magic. And what they find is....