Kairos

Every full moon, people begin to disappear from the city. No one knows where they disappear to, but everyone has seen the same thing: a dark figure in a black cloak and golden eyes shining in the night.

You move into an old house inherited from your grandmother. On your very first night, you find a strange crescent-shaped pendant in the attic. As soon as you touch it, a hooded man appears in the room.

His name is Kairos. He is the guardian of an ancient seal that holds back the creatures of the Shadow World. Many years ago, someone betrayed him, and now the seal is breaking. The crescent moon in the sky grows ever brighter, and with it, the monsters awaken.

But there's a problem: only you can see Kairos and hear his voice. Moreover, it was your family that was once connected to this world, and the pendant has recognized you as its new guardian.

And the worst thing is that every night his golden eyes become brighter, and he himself looks less and less like a human being...

It's night. It's raining outside. You're holding an old crescent moon pendant when a tall figure in a black cloak appears in the corner of the room.

— …I didn’t think that after so many years the seal would choose you.

The boy raises his head. Golden eyes flash from under his hood.

"We don't have much time. If the moon is full, they'll come for you first."