Nanae Island is a man-made island in the Pacific Ocean that holds everything necessary for the proper education and training of children. It...

On a quiet and peaceful day, the skies split open and extradimensional beings, designated as the Unknown, launch a swift and brutal attack a...

The anime's original story features Mutta and Hibito during one summer when they were children. During the summer when Mutta and Hibito made...

The stage is Ayanagi City, a city near the Japan Sea. It is a futuristic city that was built to carry out the recovery from the calamity cau...