Daisuki desu!! Mahou Tenshi Cosmos

Akikaze Cosmos is an elementary student who assists in managing her mother's hostel in the town of Hanami. She is more responsible than the older hostel residents, including Soyokaze, a high school girl; Sonoko, a college student who drinks; and Raita, a pervert. The town appears normal, aside from the fact that the surrounding area is a restricted nuclear desert. While exploring the forbidden zone, Cosmos is unexpectedly changed into a magical angel.