Ando Riho is invited by Saegi Miona, an associate professor who she admires at university and goes to Miona's laboratory.

I was asked to pretend to be a young woman and work as a part-timer to meet and talk to her and when I met her and had dinner while talking to her, I became dazed and fell asleep. When I woke up, the other party was playing with my body in the car.

When Riho visits the lab, she is told that she has received a lot of money for her part-time job and not to tell the police about this incident. A few days later, Miona contacted me and asked me to do the same part-time job as last time when I headed to the laboratory.

It seemed that Miona had watched Riho for a few days and felt that she could not forget the exciting sex that she saw through and impersonated her inability to enjoy college life and asked Riho out again.

Knowing all this, Riho takes a part-time job and pretends to be another woman to meet a man on a social networking site.