Since my Useless Working Sister and Other Troublemakers Became Magical Girls, I have no Choice but to Support Them

I’m a high school student living with my older sister, Aina, who is already working. While I appreciate how much she cares for me, she’s a bit of a mess and yells about not wanting to go to work every morning. One day, strange creatures and monsters rampaging through the city appeared before Aina and me. Then, Aina transformed into a magical girl and defeated the monsters. Becoming a magical girl who protects the city and brings hope to people seems like a bit too much for my sister. And the other members who became magical girls? An elementary school student who lives for fluffiness and a wheelchair-bound classmate with one leg missing!? Can I, along with these overly unique magical girls, really protect the world? This is the story of my battles and daily life with the magical girls and other companions.