Kyôfu joshikôkô: bôkô rinchi kyôshitsu (1973) by Norifumi Suzuki
aka: Terrifying Girls’ High School: Lynch Law Classroom

The chemistry lab of The School of Hope, a corrupt collecting point for japanese delinquent girls, is one of the main scenarios for the nasty but imaginative punishments of the so called discipline-brigade formed by a bunch of bitchy students. The cruel idyll changes whith the arrival of tough girl gang leader The boss with the cross (Miki Sukimoto) who wants to revenge the death of her former lieutenant.

A cold wind is blowing
Not a soul on campus
The shadows cast are full of lies
Purposely with a light step
A cute little pup comes to play.
And won ‘t leave me alone
Days of song are so far a way.
They’ll never come again for me

seen at: pickledfeet private video collection