Instead of the usual opening, the story begins with a detective following the case of the disappearance of young men in a local area. The trail leads to the Mantis Bar where eyewitnesses say they made contact with a particular woman. A woman, whom the man she's with claims to be an actress, tells his date she wants him. While a young man drinks his beverage in slight jealousy, the detective from earlier watches the pair outside. Soon, the woman comes back and finds the young man still at his seat. She explains she got stood up, and the young man says he knew since he overheard the two, but then fumbles his words. The woman calls him cute and says she wants him. The two of them walk out of the bar while the detective follows them. From behind a corner, the detective watches as the couple confess their feelings for each other. Suddenly, the woman's arms fall off, and the woman's body tears away, revealing a giant praying mantis underneath the human disguise. The detective watches in horror as the mantis devours the man. Suddenly, the mantis turns around and giggles at him as he screams while a yellow smiling mask falls - All of a sudden, the detective wakes up and finds himself sitting on a park bench at late afternoon. As the kamishibaiya walks by with his bike and kamishibai theater in tow, the opening theme of seasons 1, 2 and 4 begins to play and the detective wonders what that case was really about. "The truth of the case is lost in darkness," he says. Suddenly, the kamishibaiya turns around and the story ends, revealing the title of the story and the kamishbaiya ending the story as he always does, "Oshimai."
