Daigo has survived six months of hard training to become a firefighter. Right after his graduation ceremony, he rushes to Medaka-ga-oka High School, because he can't wait to tell Shizuka, his former homeroom teacher, that he has finally become a firefighter.

It was Shizuka who recommended that Daigo become a firefighter. When Daigo was still small, he was miraculously rescued from a disastrous fire. Since then, it had always been Daigo's dream to become a firefighter. However, in high school, he had forgotten all about his dream and had no idea of what he wanted to be when he grew up. That was when Shizuka reminded Daigo of his dream.

Daigo gets assigned to Medaka-ga-oka Fire Department, which is located in his hometown. He heads to work with great expectations, but what Daigo sees is far from what he had in mind. The Fire Chief Hajime Gomi, and the rest of the crew seem to be far too undisciplined for firefighters.

As a rookie firefighter, Daigo gets dispatched to put out fires at schools, houses, and save cats stuck on roofs. Working with Hajime and others, Daigo acquires the knowledge and skills necessary for the job. He also learns about teamwork and how difficult it is to save a person's life. Daigo's colleagues are the rookie Shiro, fire truck driver Mahiru, Mitsuru, Hikosuke, Hiroshi, and paramedic Jun. At first, Daigo acts alone without thinking, and is seen as a trouble-maker. However, his instincts as a firefighter are exceptionally sharp, and he soon gains the recognition of his fellow firefighters.

Fire is not the only thing challenging Daigo in this story. While he still has feelings for his first love Shizuka, Mahiru and Jun are also on his mind. Daigo's rival Shiro seems to be after these women too.

Cast
* Yamada Takayuki as Asahina Daigo (18)
* Uchiyama Rina as Sonoda Mahiru (22)
* Mimura as Kondo Jun (19)
* Tsukamoto Takashi as Amakasu Shiro (19)
* Katsurayama Shingo as Akaboshi Mitsuru (32)
* Konishi Manami as Ochiai Shizuka (26)
* Ishiguro Ken as Taira Shigeru (38)
* Kaga Takeshi as Gomi Hajime (48)
* Oshima Yoko as Asahina Miyako
* Koide Saori as Asahina Miki
* Nukumizu Youichi as Manjo Hakase
* Morooka as Ueki
* Matoba Koji as Kanda Isao
* Hanabara Teruko
* Hiraizumi Sei
* Ehata Hironori
* Komatsu Takuya
* Fukazawa Atsushi

Guests
* Shimada Kyusaku (ep1)
* Oguri Shun as Yazawa Ken (ep2)
* Matsushige Yutaka as Inspector Morita (ep2)
* Hiraga Masaomi (ep3)
* Suga Kenta as Kouta (ep3)
* Morishita Ryoko (ep3)
* Kitaro as Yoneda (ep4)
* Imai Yoko (ep6)
* Sakurai Chizu (ep8)
* Saito Keita (ep11)
* Ino Serina