(hardsubbed by Nya!)
Broadcast period: July 8, 2006 - Sept. 16, 2006

Synopsis: Sakaki "Tornado" Makio is 27 years old, a high school drop-out, and he comes from a yakuza family. One night, he was sent to deal with a big deal in Hong Kong, after messing up addition, his father told him to go back to high school and get his diploma before he is given the position of boss. If he fails to get his high school diploma, the spot will be given to his younger brother, Mikio.
Also, he must pose as a 17 year-old student in the school. If his cover is blown, then his chance of becoming boss is over. The story shows his struggles learning, taking tests and relationships with students 10 years younger than him.

Characters:
Sakaki Makio - Nagase Tomoya
Sakurakouji Jun - Tegoshi Yuya
Manabe Kazuya - Tanaka Koki
Umemura Hikari - Aragaki Yui
Minami Yuriko - Kashii Yu
Sakaki Mikio - Kikawaya Masaya
[and more~]

Review: I LOVE this drama! First I was just going to watch it because Tegoshi was going to be in it, but soon it became just to watch for the comedy! It has many different things that just make you laugh for hours on end. It's recommended for those who need a good laugh.
9.8/10 (still has a little bit of flaws too though~ But overall!!)

And some screencaps from the first episode.

omg i love this series it was sooooooo funny!!! I really like that guy expressions!!! i find the tatoo part alittle freaky but overall it's really good!!

pity , i only can understand cantonese

iiiiiiiiiiiiiiiiiiiiiii loooooooooooooooooovvvvvvvvvvvvveeeeeeeeee this drama even though i didnt finish watching it but it was sooooo funny the main character guy of this movie also did yan papa but it is an older drama but still good

i really love this jdorama when i watched it in the last part tears fall from my eye.It's so inspiring i never thought that this comedy will be the reason for me to cry i love this so much.. hehe..!

This is one of the best comedies

That must be a funny series, if it is anything like the movie(the original Korean movie). Going back to highschool as an adult is always a funny premise. On a similar note, there is Korean movie called She's on Duty, which has a female cop going undercover as a highschool student.

I would definitely love to see this series, if I could find it subbed.

Love it! Damn funny!
Makio is hella of an actor.
I like when he make the orc kind of face. XD

great commedies.....
it's makes me remember ...my school days....
"ume ume ume....umemura-san"

heheheh aragaki yuii....kawaii deso neeei

i only watched this series halfway because suddenly homeworks are pilling up. seems like it is a funny drama, judging from the other's post reply