Five years ago, Kakeru Satsuki's older sister committed suicide. Since then, his right eye has become a shade of gold, and he wears an eyepatch to cover it. The only person he's friends with is his childhood friend Yuka and classmates Kaori and Tadashi. But inside, he has no interest in anything. While walking home with Yuka one day, the world suddenly changes. The sky becomes red, the moon becomes black and Eldritch Abominations called Laruva roam the street. This is just the beginning of what is about to unfold. The series also has a Gaiden Game, 11eyes -Resona Forma-.