"Demons are born not because there is a problem with Spiritual Energy itself,"
Bad Day summed up, "but because humans are too weak. Not just physically weak, but their will, their heart, and their spirit are all too fragile—"
"Spiritual Energy is so powerful it doesn't seem like something developed by humans, let alone something that humans can use. Although it appears that Spiritual Energy Users have only been around for a hundred years, I believe the existence of 'Spiritual Energy' predates that number by far.
"It's more like an inheritance from an ancestor. It's as if they left their pet in a pet hospital and never came back... And we're just the new customers here to adopt it.
"There might be intervals of hundreds of years, thousands of years, or maybe even tens of thousands of years between. At least that's what I think."
Such a smooth transition between himself and the Demon, without any preparation or any impact on his body.
