Following on from the first season, you're shown some of the history of the Sekirei. War has begun, but not everybody is willing to take part. Minato is back with Musubi, Kusano, Matsu and Tsukiumi. The girls are still fighting over who gets to be his wife, and Matsu still just wants him all to herself. We've already met Homura and Kazehana, but they start to become more prominent in the story. Minato gains two new Sekirei. Things start to get serious, but it keeps it's comedic side and balances them both well. Questions begin to be answered and more start to be asked. Kazehana joins inon the girls battling for Minato's attention, and Homura is struggling with who he is.
Yukari and Shiina become more active in the series, and their parts are great. Funny and serious, important parts to the story.
I didn't expect any part of this to make me teary, but it definitely did.

The ending is really intense and satisfying. But again, leaves you waiting for the next season.