Two months after that incident. (Ever17 events) Takeda regained his peaceful daily life and lived a life without any inconvenience. The arrival of hot summer. The start of a summer vacation like no other. --- However, such a daily life collapsed due to the occurrence of a bizarre incident. It all started when a woman's unnatural corpse was found in a neighborhood back alley. A strange rotting odor drifts across the crime scene...a rotting corpse. There is a large hole in the chest and the organs are gouged out. A mysterious murder case that suddenly attacked a peaceful town. The incident fuels Sara's curiosity and makes her decide to investigate independently. "This is the formation of a ninja detective duo !?" And now, a ninja detective combination has been formed here. New truths and mysteries revealed by following the incident. And meeting and parting. What is the truth behind the incident that connects the past and reality? It was the moment when the boring summer vacation changed a little.