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?"

Hideo Suzuki is a 35-year-old mangaka assistant, whose life seem to be stuck around his exhausting but low-paying job, unfulfilled dreams, strange hallucinations and unsatisfying relationships. He sees himself as a supporting character in his own life, has low self-esteem, resulting in frustration. One day, the world as Hideo knows it is shattered by the presence of a disease that turns people into homicidal maniacs, whose first instinct is to attack and devour the nearest human.