Akikaze Cosmos is a regular elementary student who also helps take care of the hostel that her mom operates in the town of Hanami. She is incredibly responsible for her age and seems much more mature than the other older residents of the hostel, like the high-school girl Soyokaze, the college drunk Sonoko, and the pervert Raita. Everything about this hostel and the town of Hanami seems normal except that everything outside of the town is a nuclear desert where no one is allowed to enter. But when Cosmos unwillingly wanders into the lifeless desert, she is somehow transformed into a magical angel.

Shinya doesn’t get stellar grades, he’s not athletic, he’s a coward, he’s a wimp…he’s a general good-for-nothing. One day, he meets Haruna, a girl that could change his life forever. Haruna tells Shinya he is the Messiah. The Lord chosen to save her world and that she is his shield. Could it be true? Could Shinya’s life of ineptitude be balance for this one grand cause? Is he really the Messiah? If he is, can he save himself, let alone an entire world?

The Official Sora no Otoshimono spin-off 4 panel manga. The story revolves around the three Angeloids naming Astrea, Ikaros & Nymph and how they go about their not so ordinary life on earth.