Sensei wa Erai

Summary
Nakajima, Chinen, and Arioka play three useless students at a public junior high school. At first, they find their homeroom teacher dull and bothersome, but an incident leads them to take a liking to him. Along with their former classmate (Yamada) who now attends a private school, the students unite to transform their teacher into a respectable guy. --Tokyograph
(Source: DramaWiki)

Cast
Nakajima Yuto - Matsuki Souta
Yamada Ryosuke - Guunjou Hayato
Chinen Yuri - Umeno Wataru
Arioka Daiki - Takekura Rin
Yusuke Santamaria - Uzaki Kenya aka Uza-Ken
Karina - Aoyama Yuki
Abe Tsuyoshi - Ikeno
Omi Toshinori - Matsuki Kikuichirou
Sakakibara Ikue - Matsuki Hanae
Nakata Daichi - Matsuki Takumi
Yasuda Ken - Aoyama Akio
Tanaka Asami - Tanaka Miruko
Adachi Rika - Suzuki Momo
Tajima Tomo - Kato Sara
Wakaba Ryuya - Saeki Jun
Nozawa Yuuki - Watasegawa Koki
Ookawa Keigo - Wakanomiya Makoto