Yukimura Suzune questioned, "Since you say the blue light was plasma caused by tectonic stress, why did it appear before but hasn't appeared for so many years now?"
Akita Sana thought for a moment.
"That's true."
"The old school building is still there."
"But the records show that the blue light hasn't appeared for decades."
Natsume Chikage smiled. "That is indeed a good question."
"And the answer is simple."
"Although the old school building wasn't demolished, it was essentially no different from being abandoned. The old pipes inside were removed decades ago during pipeline renovations."
"And once those conductive pipes were gone, the blue light naturally stopped appearing."
"There are records of this in the school library."
"When we were researching the other supernatural mysteries, we collected information on the old school building. It's still recorded in our Collection Club journal. You'll know if you flip through it."
Akita Sana checked the journal and said in surprise, "It really is true!"
"Everything is exactly as Chikage said, both the tectonic plates and the removal of the old school building's pipes!"
Yukimura Suzune looked at the journal Akita Sana handed her, then puffed out her cheeks slightly. She had to admit it.
Yet she could not help muttering to herself.
How did this guy reach the answer so quickly?
Wasn't he just listening to the story?
How did he immediately solve one of the Seven Great Mysteries that no one had been able to solve for so many years?
Fujiwara Aoi happily said, "Chikage, you're amazing! How did you figure out the truth so quickly?"
Everyone present could not help pricking up their ears at that question.
Natsume Chikage smiled and explained, "Because there was a similar case in the United States. I happened to see a similar earthquake-related phenomenon before."