Arata Kaizaki (Taishi Nakagawa) berusia 27 tahun dan menganggur. Dia berhenti dari pekerjaan sebelumnya setelah bekerja untuk perusahaan selama 3 bulan. Arata Kaizaki memutuskan untuk ambil bagian dalam program penelitian "ReLIFE." Dia meminum obat yang membuatnya terlihat 10 tahun lebih muda dan dia akan bersekolah selama setahun. Di sana, ia jatuh cinta pada siswa SMU Chizuru Hishiro (Yuna Taira).
In conjunction with the release of the movie "Teiichi no Kuni", FujiTV is showing a 5-part spin-off drama featuring the 5 main actors who play characters fighting for the post of student council chairman with Teiichi. The students are hosting strategy meetings for the student council elections at Kaitei, the coffee shop adjacent to their school. Each episode features one actor as the lead.
Nori Kamitsuki (Shotaro Mamiya) is a high school student. He transferred to a school in Gunma Prefecture. There, he learns of various culture in Gunma from a student who loves his hometown. He is really surprised by the cultural difference. At school, Nori Kamitsuki falls in love with Kyo Shinooka. Unfortunately, she loves her hometown and says she will only date a guy from Gunma. Making things worse, Nori Kamitsuki gets involved at a fight against Tochigi Prefecture and Ibaraki Prefecture which are Gunma’s rivals.
Takatoshi Minamiyama (Sota Fukushi) majors in art at an university in Kyoto. On the train to the school, he sees Emi Fukuju (Nana Komatsu) and falls in love with her at first sight. Gathering up all his courage, he speaks to her. They begin to date and enjoy happy days together, but Emi reveals her secret to him.
Drama series reveals why Setoka (Tao Tsuchiya) was rejected 12 times, her fateful meeting with Chiaki (Takuya Kusakawa), meeting her first love Takane (Yudai Chiba) and her school days with her classmates Kunimitsu (Yosuke Sugino) and Chiyuki (Ito Ono).
Takashi Hayama (Nijiro Murakami) is a third year high school student. He falls in love with Azusa Oribe (Akari Hayami) at first sight and they begin to date.
One day, Azusa tells Takashi "people who meet me, forget about me several hours later."
Takashi doesn't believe Azusa, but by chance he realizes that he forgot about Azusa. So he won't forget Azusa, Takashi begins to leave a note for himself and Azusa.
Sayaka Kudo (Kasumi Arimura) is a 2nd grade high school student. She is a gal who wears miniskirts and has her hair dyed blonde. Even though she is a high school student, her actual academic grade level is on par with 4th grade elementary school students. During the summer, Sayaka attends a private institution. There, she meets Teacher Tsubota. Besides her mother, Teacher Tsubota is the first adult to praise her. Sayaka begins to change. She studies hard and eventually passes an entrance exam for Keio University.
Naho Takamiya (Tao Tsuchiya) is a 2nd year high school student. During the spring, Naho Takamiya receives a letter sent by herself from 10 years in the future. In the letter, she liked transfer student Kakeru Naruse (Kento Yamazaki). Kakeru Naruse carried emotional scars from his mother's suicide and he died one year later. 26-years-old Naho Takamiya thinks about Kakeru Naruse often.
2nd year high school student Naho Takamiya, with the knowledge of what she feels 10 years in the future, takes action to change her future.
Moritaka Mashiro (Takeru Satoh) doesn't want to follow in the path of his uncle who worked as a manga artist, but ultimately died because of exhaustion. Moritaka Mashiro figures he will graduate from school and work at an office. Things change though when falls in love with a girl at school. The girl, who hopes to become a voice actress, tells Moritaka they can marry, but only after they both achieve their dreams. Moritaka then teams up with fellow classmate Akito Takagi (Ryunosuke Kamiki) to publish their first manga.
A mysterious creature destroys 70% of the moon. The creature then warns that if he is not destroyed by March of next year, Earth will be next. The creature also demands that he becomes the homeroom teacher for 3rd grade E class at Kunugigaoka Junior High School. The government is powerless to say no.
The creature then becomes the homeroom teacher of 3rd grade E class which consists of failed students including Nagisa Shiota (Ryosuke Yamada). The creature is called Teacher Koro.
Meanwhile, the government requests that the students try to kill Teacher Koro even though he possesses super powers. The government offers a 10 billion yen reward for whomever successfully kills him. The students are confused by the situation, but decide to kill Teacher Koro.
When their class begins with Teacher Koro, the students finds themselves having a good time with their new teacher.