Kōri no Haka: Ichiyanagi Nagomu, 3-dome no Junan

The accident-prone bad luck magnet Nagomu Ichiyanagi and his friend Hiyori are involved in some mysterious incident again. Now put on your detective hats and join Nagomu in his quest to find the culprit behind the horrific events.

Arnold, the count of Ruroi, invites the duo to the house of Cedrei to investigate the strange incidents in the secluded island. The late Baron of Cedrei built a mansion to house the spirit of Delia, a young girl who sacrificed herself to seal the demon. However, it seems like Delia alone isn’t enough to satisfy the demon’s appetite, he wants more blood.

Are the events caused by the baron’s three successors, or are there real supernatural forces lurking around?