However, their ordinary life was a facade. Unbeknownst to their neighbors and even to Kenta, Akane had been engaging in a peculiar ritual. She had stumbled upon an old, mysterious-looking book hidden in the attic, which turned out to be a grimoire. The book, titled "Niraku," offered dark, ancient magic. Akane, intrigued by the forbidden knowledge, began to experiment with the spells, leading to bizarre occurrences around their house.