Holding the camping invitation Ririka received from the neighborhood association meeting, she and her husband laughed off the idea of attending—two nights and three days, plus it was during the workweek. Just as they were dismissing it together, the doorbell rang, interrupting their conversation. It was Mr. Ozawa, the head of the neighborhood association, and Mr. Yoshimura. As they pushed their way into the house and saw the couple's reluctance, Mr. Ozawa called a senior colleague they both knew, gradually tightening the pressure. Ultimately, they had no choice but to agree. But on the day they set out, another trap was already waiting for them.