The story takes place in the peaceful and quiet Sorumi Town, where the ordinary boy Sakurai Tomoki (voiced by Hoshi Soichiro) lives a solitary life. Every night, Tomoki dreams of angels falling from the sky. Although troubled by dreams, Tomoki's every day can still be called calm. One day, an unknown creature named Ikaros (voiced by Hayami Saori) landed next to Tomoki. She has a cute face, but has huge wings on her back. Did everything in the dream become a reality? The kind-hearted Tomoki took Ikaros in, and his gentleness and sincerity touched this angel who should have been ruthless. Afterwards, the two angels Nymph (voiced by Nomizu Iori) and Astraea (voiced by Fukuhara Kaori) were also influenced by Tomoki and stayed by his side. Where did these angels come from? Why did they come? Behind them, it seems that many unknown secrets are hidden.