Tamura Yujiro and Hiyori have been married for four years. They look like a happily married couple, but, Hiyori secretly badmouths her husband on social media page "Husband Death Note."
Long-time friends Jinko and Motoko hear that their college friend Miki has jumped into the ocean. They are joined by Haraki, who Jinko happens to meet, and head by car on a journey to see Miki.
