Sayaka Harada

Kuroi Souya is a high schooler living a peaceful life despite having no memories of his past. One day, however, his town is attacked by one of the mysterious Nebula Weapons. Together with the cat-like "Sensei" and the gothic lolita Ginko, Souya gets dragged into a battle against... seven superheroes who protect the town! What is Souya's reason to fight? The answer lies in his memories. (crunchyroll.com)

Takanashi Misha is a second grade elementary school girl whose father is Japanese and mother was Russian. After she lost her mother at an early age, she has lived alone with her father. One day, a new maid named Kamoi Tsubame comes to their house to serve as their maid. She was a former master sergeant of Japan Air Self-Defense Force, and her biggest problem is that she is a lolicon who is deeply attracted to Misha. (imdb)