My Girlfriend Says She’s Going To Cheat if I Don’t Cum inside

Bong-seok, a male employee, and his female team leader, Mi-ja, are a secret couple within their company. One day, Song-yi, Bong-seok’s ex-girlfriend, joins the company as a new employee. Bong-seok enjoys a secret meeting with his ex-girlfriend outside the office, but Mi-ja happens to see it. As a result, Mi-ja instructs her other male subordinate to seduce Song-yi, using his promotion as bait.

The office is filled with constant moaning from the four men and women.