How Can I, a Girl, Keep It Secret from My Live-In Girlfriend?

Qiu Ran, 24, is an overworked office drone with a loving girlfriend. After getting hit by a car, he agrees to a mad scientist's deal to sell himself in exchange for a chance to survive.

When I woke up, I couldn't believe my eyes! Hatsune Miku!

Not only am I forbidden from revealing my identity, but I also have to undergo a series of inhumane experiments?!

By a twist of fate, Qiu Ran's girlfriend is assigned to the same dorm room as her. Can Qiu Ran keep his identity a secret?

This is a youthful romantic comedy (probably).