For the general description of this unopened set, see 40400080, except that there should only be 120 stickers in this set.  The Kagerou Project (カゲロウプロジェクト, Kagerō Purojekuto, lit. “Heat Haze Project”), also known as “Kagerou Daze” (カゲロウデイズ or “Kagerou Days”, is a Japanese mixed-media project that started as a Vocaloid song series created by Jin (Shizen no Teki-P) and whose story revolves around the Mekakushi Dan, a group of young people with unusual eye-related powers.  We believe through online search that this is the background associated with this set of cards, but you might be able to shed light on that.  Grade: 1