A mountain village where all sorts of supernatural entities are said to gather.

One day, a strange request comes to the famous eccentric yokai hunter, Kamishiro Rui.

Please investigate the vampire castle.

· · ·

Passing through a garden overflowing with red roses, Kamishiro Rui steps boldly toward the castle of rumors.

There were many strange things, but the most peculiar anomaly was the roses. Every time he touches a petal, a warm, unfamiliar memory flashes through his mind.

Someone's happy memory.

While harboring doubts, the moment he enters deep into the castle, a mysterious figure reveals itself in the darkness.