If it's a game, maybe it's similar to "The Seven Deadly Sins" or "The Seven Knights," where a seven-member team plays a central role. The "Umeru" part could suggest merging or combining elements, so maybe the gameplay involves team cooperation. The "Mesu Tachi" could be the team or members with measurement-related abilities. Alternatively, it might be a story where characters have to measure or quantify something to achieve their goals.