@ Home Mate

＠ふぉーむメイト 

A secluded summer house.... An important place where Nanao spent his childhood with the Yunagi sisters, Nanoha, Noa, and Yakumo. One day, he, who is now a caretaker of the house, receives a call from them, whom he hasn't met for a long time, that they will visit the house. Will he be able to spend happy time with them like before or...?