A documentary about an ordinary girl's girlfriend: A college student having unprotected sex with a senior colleague at work. (PKPD-351)

Let me introduce my girlfriend. She's my junior from four years in the industry; we met while working at a coffee shop. We only found out over drinks that she enjoys sex. I initially thought she had many girlfriends, but she doesn't like having sex with incompatible people, and she comes to see me every week. So, I guess we can become boyfriend and girlfriend?