In Maid Mansion, things are about to change for a young man who has lived a sheltered life. His grandfather recently died, who was a wealthy navy admiral. He left his grandson his entire fortune and mansion. There is only one condition: the grandson can't fire the head maid named Takako. Why did his grandpa care so much about this woman? She's only a maid. The grandson will have to figure out what's going on, and in the process, he uncovers truths that no one could ever imagine.