
Takayama Naoto is a high school second-year who dreams of being a train conductor. In hopes of getting a job with Japan National Railways, one of the ...

Having qualified for on-the-job training, Naoto is assigned to K4, the Tokyo Central Railway Security 4th Guard Team. Waiting for him there are his pa...

Sassho Mari, like Naoto, is a second year at Kiryu Railway High School. She's into cooking, cleaning, doing laundry, and collecting recordings of trai...

The popular idol Kashima Noa is named the honorary railway security team leader for the day, and K4 is appointed to guard her. They accompany Noa on t...

Early in the morning, Naoto is dragged into shooting practice with Aoi beneath Tokyo Station. When they finish, Aoi still doesn't seem satisfied. Then...

The members of K4 have been punished with at-home suspension for their reckless actions on the Ashio Line. Naoto is relaxing at home when he receives ...

Naoto and the other K4 members head to Karuizawa for Advanced Railway Security Force Training. Naoto is excited to hear that they'll have a course on ...

Misunderstandings further threaten the harmony among the K4 members. Even the weather is on a rampage, causing a landslide near Karuizawa. Meanwhile, ...

Naoto and K4 head toward Yokokawa as the rain plummets down. Haruka says the track from Usui Bridge No. 3 to Yokokawa should be safe since it's regula...

Prince Bernina of the small Mediterranean kingdom of Atella has arrived in Japan to attend a sister city ceremony in Sapporo, and the K4 members are a...

Naoto and the others managed to fight off their attackers on the Hokutosei, but while on the run, Naoto and Bernina find themselves under attack again...