Netori story in the present day. Various sexual disciplines taught in the school. Two types of training: in confinement and of assault.
The former focuses on torture-like acts, and the latter on the demoniac initiations to the pleasure.

Trying to protect her family, Makoto keeps silent about her being forced to undergo various sexual assaults. And after successive merciless trainings, she learns the truth...

[From DLsite English]