Magical Girl Raising Project, Vol. 14 (light novel)

An experiment gone wrong leads to the death of a famous mage, and thepassing of this illustrious individual sends the Magical Kingdom intomourning. Then, a few months later, the deceased mages relationsreceive letters from his proxy regarding the inheritance of his estate,inviting them to a tiny uninhabited island the mage had used as a getawaycottage/research lab. When Mana gets one of these letters,shes skeptical, but after careful consideration, she contacts twomagical-girl friends to accompany her there...