1986 - Ichiro Ogawa (played by Sadao Abe) was a physical education teacher in the Showa era. He was famous for his strict guidance, which he called “the whip of love”.He also serves as an advisor to the baseball club and is known as “Hell Ogawa” by the students.

On the other hand, at home, he is a normal father, raising his 17-year-old daughter Junko (played by Yumi Kawai) alone and taking care of her daughter's bad behavior.Recently, Junko is very concerned about the time of Ichiro's return, worried that he will bring a man to her house to have sex with him.

One day, Ichiro was taking the bus home while smoking as usual, and ended up dozing off.

When Ichiro wakes up, he sees a high school girl boarding the bus wearing a skirt with her panties exposed and noodles hanging from her ears.Ichiro notices something off about his appearance and points it out, but the passengers argue, saying Ichiro is the one smoking in the car.Ichiro got out of the car as if he was running away, but what he saw was a different scenery, with people wearing strange clothes he had never seen before.

He finally found a familiar coffee shop. Before he could fully understand the situation, Ichiro became angry and drank the beer of Inujima Nagisa (played by Naka Risa) on the counter without permission, and the two had a dispute..

At the same time, on the same day in 1986, Junko was suddenly confessed by Takasaka Kiyoshi (played by Sakamoto Aito).Kiyoshi is a junior high school student who travels back from the Reiwa era to the Showa era with his sociologist mother Sakae (Yoshida Yo).He met Junko by chance on the street and fell in love at first sight.Although Junko secretly has a crush on Mutsumi Akitsu (played by Hayato Isomura), known as “Muchi-senpai”, she still tries to bring Kiyoshi into her home...!?

What was “normal” in the Showa era was “inappropriate” in the Reiwa era!?

The time lapse comedy depicting the gap between us and the self-awareness of empathy after slipping from the “Showa” era to the “Reiwa” era begins!