Senran Kagura was originally a video game series that later spawned a multimedia franchise it follows 2 shinobi schools (good and evil) but later expands to following 4 and a few other factions. It is mainly a musou/beat em up game however the shniobi are all female. While there is a lot of fanservice it has serious stories great fun action and interesting characters. Katsuragi is one of my personal favorite she's so similar to me it's nutty.