Hanzou

There was a time when there were ninja serving the powerful, hired for intelligence missions, destruction, or assassination. While the times have changed, the need for ninja has not vanished. In a particular school, there are girls who are secretly in training to become ninja. Ninjas-in-training, Asuka, Katsuragi, Hibari, Ikaruga, and Yagyuu each have a secret technique scroll…

What do an alien, a rogue ninja, a girl with superpowers, and a disguised boy have in common? They're all friends hiding as 8th graders at an all-girls school. Though none of them are aware of each other's secret, their lies keep their friendship tight. If this wild bunch isn't enough, their classroom is in danger of being destroyed...oh and Earth too! Source: Crunchyroll