"They are the offspring of Sirens and Moon People."
"Unlike humankind, it is almost impossible for demons to reproduce among themselves. It's no exaggeration to say that the probability of conceiving offspring is several orders of magnitude lower than that of high-level elves."
"A long, long time ago, when the Moon People were still considered normal, there once was a flourishing Sea Moon Demon who ruled the Seven Seas—"
[Dominion (Seven Seas is a metaphor, referring to the entire ocean, minimum +5.)]
D70+5=d70(67)+5=72
[Sea Moon Demon R1-R9 Lord of the Seven Seas by moonlight (Critical Success additional judgment, 70+ enhanced Mermaid Incarnation)]
D100+30=d100(57)+30=87
"But that was really too long ago and I've never seen it, it's only mentioned in literature, which no longer exists anyway."
