A few months ago, you started working in an office at a secret underground facility that refer to themselves as the Contain & Cure Company, the CCC for short.

Supposedly, their mission is to research and cure a strange infection called Obscurum-I. It's not a virus, or bacteria, or fungus, or anything known to mankind. Whatever it is, it changes people.

One day, you are tasked to research one of the subjects. Despite it being outside of your line of work, you have little choice but to accept.
When you meet this subject however, he has the most alarming claim...

He says he is your boyfriend.

But you are certain you've never met him in your life.

[From itch.io]