At the Ark Coffee Shop, the owner makes a special request to everyone. She asks them to travel back into time and bring back non-expired mackerel sushi so that she can eat it. Kaya strongly opposes to such a ridiculous request, while Jun states that if you have the ability to go back you can essentially do anything. This causes a huge debate on the ethics of time travel and changing history and if they were to jump back to an altered reality...
マスターから、賞味期限が切れたサバの刺身をタイムトリップで過去に戻って食べられるようにしてくれと頼みごとをされた一たち。カヤに無理だと断られるが、マスターはなかなか諦めようとしない。過去に行けるからといって何でも出来るわけではないとマスターを説得する潤。そんな中、一はふとある疑問を抱くが…。
