A community is shocked when the bodies of an elderly man and the manager of a home-visit nursing centre are found. The passing of 42 elderly patients is connected to Shiba, a caretaker recognised for his affection and dedication.

Newlyweds Nana and Shota Tezuka move into an apartment. Two situations, different from the drama series, take place: "What if Shota attends the resident's meeting and not Nana?" and "What if exchange murder game doesn't begin?"