“This summer, will you take care of my parent’s vacation house? All you have to do is tell the help what to do. There’s a reward in it for you.”

At his upperclassman’s request, the protagonist arrives at a desolate train station. He is greeted by a woman in a black maid’s uniform.

For the next month, he has to pass himself off as his schoolmate, or not only will he lose his compensation, he might even lose his life! He thought it was just a joke, but these girls are serious.

He is lead to a mansion deep in the forest, where five maids are waiting for him...

[Translation of synopsis from Getchu.com]