The Shadows Don't Sleep

Did you know that there are many things around you that aren’t visible to a human’s eye? In this world, shadows lurk everywhere. Humans can’t see shadows, but who knows if a shadow is right behind you. Leon is your average student in Class 3-B. He is the bassist of Spiral High’s light music club. The club is preparing for the winter festival in December, but the day comes sooner than they thought. Everything becomes worse when Leon bumps into a strange girl who goes by Sukie. After meeting her, he could see the shadows, sneaking high and low. Leon can tell that Sukie is hiding something from him, and he wants to find the truth behind her. Will Leon find out who Sukie really is while practicing for the winter festival?