Conflict? Subservience? Or interspecies love? How will you break this proud, elegant succubus?
By day, the honor student everyone admires—Yana Koza.

By night, the dream demon who slips into dreams to feast on vitality—Yona.

And you, the newcomer who has encroached upon her hunting grounds... The monstrous dream demon "Nightmare," invisible to humans and capable of warping dreams themselves.

By day, you observe Yona as she blends into human society, interfering with her and sometimes stepping into her daily life. By night, you compete for vitality and dominance within dreams.
It is the law of the jungle among dream demons: the stronger one rules the other. Yesterday's winner might not be today's.
Will you be enemies or coexist? Will you keep her, or be kept by her? Or—will you become each other's one and only?
Neither the relationship with Yona nor the ending is decided. Your actions and her choices will create what comes next.

And then, there is one more...

"Hehe. Staring so much... what exactly are you expecting from me?"
"You should run while you still can. —That is, if you think you can actually escape me inside a dream."
Yona's form when disguised as a human.
The other protagonist. The "Strongest"—but a hidden character.
Still, there was no panic in her expression.
(...Well. Spending time like this isn't so bad, I suppose.)
Release Date 2026.09.25 / Last Updated 2026.09.25