Yuuta was 12-year-old boy, who had lost his father in the traffic accident one year ago. In the summer vacation, he visited a deserted dam deep in the mountains, where he had a good time with his father before. Suddenly a thunder storm occurred and he slipped on the ground. He lost consciousness and woke up to find a girl and an unfamiliar village. He time-traveled 30 years and reached a village, which sank at the bottom of the dam. This is Yuuta's precious memory of "another" summer vacation.

The third season finds Tokyo alight, as a mysterious affliction of spontaneously combusting rips through the city's population. Enter the Fire Force, with Shinra now part of Company 8 and prepared to save the city from oblivion — if he can keep his own secrets at bay.

Yoshizou Yukawa is a passionate hot springs enthusiast—a hot springs hunter who was able to sniff out the source of springs. One day, while searching for a hidden hot spring to revitalize a town, he slips off a cliff and dies. He is then reincarnated into another world by an Inari deity of a small shrine hidden in the rocks. Yoshizou is joined by Inari's messenger princess, Mayudama. The hot spring hunter within Yoshizou is stirred right away, as he takes a bath with Mayudama in the hot spring he just discovered. Then, an elf girl appears...

Second season of .