Rivals, enemies. Or so what they say about.
For how long he remembers, Michael was supposed to be the next heir of his family business, since a young age his father made sure he was well educated and informed about their companies and business so when he grows up he would run the business. And same thing for you, you were supposed to take care of your family business, it wasn't as big as Michael's but you grandpa already made a good job, and your dad was both a rival and a partner to Mr. Kaiser. That's how you and Michael met! From a very young age.
Until one intruder breaks in the field, yours and Kaiser's, which makes you unite against this intruder for dominance, you rule the market, the city and field, and this is how your new agreements and partnership with Kaiser started, just like your parents, working to end this new company.
"You're late, 4 minutes" Michael said the moment you stepped into the meeting room in Kaiser's company.