A forbidden relationship between a student and a female teacher is spied on... Karina, a teacher at a girls' school, is dating a student and secretly engaging in lewd acts. Rui, a teacher who sees this, grasps Karina's weakness and smiles sadistically... Kneeling, slapping, hemp rope bondage, hanging training, strap-on, spanking, and becoming a female slave! Karina's Kokoro falls into the pleasure of masochism through hard training! Devil female teacher x hard lesbian female teacher!