Himitsu: Top Secret - The Revelation

A sci-fi, summer story filled with suspense set on a small island with Shinpei Aijiro, whose childhood friend Ushio Kofune died. He returns to his hometown for the first time in two years for the funeral. Sou Hishigata, his best friend, suspects something's off with Ushio's death, and that someone can die next. A sinister omen is heard as an entire family next door suddenly disappears the following day. Furthermore, Mio implicates a "shadow" three days before Ushio's death.

The story of the original Subete ga F ni Naru novel revolves around Souhei Saikawa, a member of the Saikawa Research Lab. He goes on a vacation held by the lab, and Moe Nishinosono, the daughter of his mentor, joins the group on their vacation despite not being a part of the lab. There, the two end up finding a corpse. The two work together to solve the mysteries of what becomes a serial murder case.

The series follows Chrono, a 14-year-old boy who is a member of the Space-Time Police Special Forces Unit called the “Rewinders”. The organization uses its “Retry Eye” to save people who have already died, using future knowledge to repeatedly go back in time to get to a future where the victim is alive and well.

In the present day, the world is in turmoil due to an "unprecedented disaster". A young man living in Tokyo, Suzushiro, has a secret he cannot tell anyone. That secret is that he can stop the time around him despite his thoughts. One day, he meets a girl named Nazuna who has the same "power". When he learns that she is being used in a crime, he impulsively reaches out to help her.