Seven of Seven_ Vol. 5 Eight Is Enough

The Dark Side of the Nana! Everyone has a dark side to their personality. This is a problem when the different facets of your personality tend to take on physical form and have super powers. Nana is shocked when someone steals her lucky pencil just before a big test. But only the other Nanas knew where it was, and none of them would do such a thing! Enter the eighth Nana, the dark Nana, more powerful than all the others put together. But she's still part of Nana so she's willing to join the household and team up with the whole crew. Or is she?