Volume 1: [Full-color, digitally colored edition! A high school girl Katsuragi Yako's father was murdered. A brutal murder in a locked room. The mysterious case throws Yako's daily life into chaos.... While the investigation is not progressing at all, a man who calls himself "NEOBURI NEOBURI" appears before Yako in front of her in sorrow. He says, "I want to solve the ultimate mystery. He says he wants to solve the ultimate mystery...!
