XRW-649 If I Drop My Smartphone, Everything Will Be Taken from Me!! Minazuki Hikaru

A single middle-aged, unemployed man picks up a mobile phone dropped by a female student he passed in an underground passage. While fiddling with the phone at home, he discovers what appears to be a private video the student had sent to someone. The next day, the man blackmails the student, who is searching for her phone, and takes her to a nearby office building. He then records her on his phone while using a vibrator and other devices on her. After that, he brings the student to his home and continues to exploit her.