ZEX-369 I only dropped my cellphone... but I was trained by a stalker-like old man for several days. A record of those days.

Film Introduction

Mikako has dropped her smartphone on the side of the road.
A strange perverted uncle who luckily picked it up used a dating masturbation video in his smartphone to threaten Mikako and pervertedly confined and trained her...
And Mikako becomes like a beast before you know it...