In case you do not know it, this is the song "Serafuku wo nugasanaide" featured by Onyanko club in 1985.

 https://www.youtube.com/watch?v=8LfHq1S-Pmk

It has been covered by several singers including the version by AKB48.

 https://www.youtube.com/watch?v=u1R9kG6jBlA

 https://www.youtube.com/watch?v=2OzjjzaVV9Y

There are also other versions played by real JKs (high school students).

 https://www.youtube.com/watch?v=8BTbj8kiK0o

 https://www.youtube.com/watch?v=q949J6aCxPk

Finally, I recomment one of the best serafuku songs featured by Nogizaka 46. 

 https://www.youtube.com/watch?v=eOmbvj0JIeo

Hope you enjoy them.