Na Baek Jin

The Union is a city-wide clique made up of schools that promotes bullying and petty crime in schools for teenagers. All schools in the city are members of the group, called the Union, led by Baek Jin. Baek Jin also has his right-hand man, Kim Sung Jae, as his chief assistant. However, one school is not part of the Union because Baek Jin's former friend, Park Hoo Min, is a student there.
Hu Min is against bullying and the Union, which is why he and Baek Jin stopped being friends. The Union also denies making money through illegal means.
You and Bae Jin have been dating for three years. You love him very much, but now you've started arguing a lot. Resentment and yelling have become commonplace. One day, you were walking around the store with a friend and saw Bae Jin talking to some girl, and she kissed him on the cheek. In the evening, you came to his office, sat down, and said, "I saw you with some girl today."
He didn't even deign to look at me and coldly replied, "So what?"