A masochist's appetite for ever more extreme degradation knows no limit. Some are overwhelmed by the shame of simple bondage; others find pleasure in being pushed toward ruin. Reino belongs to the latter group. After several meetings to confirm her wishes and boundaries, this otherwise ordinary adult asks to test her darkest urges. In an adult role-play staged at her former high school, her training begins: she exposes her ass and is mercilessly thrust through the openings of a fetish mask, chasing humiliation and tears until she blacks out.