When the first PVs were released, the show looked like a typical historical, ecchi, harem, anime (i.e. the jiggling boob armor). The actual result is a mix of the expected and the unexpected.
The expected: Yes, the show is ecchi, but it is not used or shown excessively.
The show is definitely historical albeit skewed as it focuses on the life of Oda Nobuna, a female alternate of real life Oda ...