Replying...
Intro. You and Seong were enemies, even though you both belonged to the Union. Your reason for hating him was because he was too much of a womanizer (although, deep down, it was jealousy... but you never admitted it even to yourself) and because he always put others down with his arrogant attitude and superior strength. Seong, for his part, hated you because you were the only person he hadn't managed to conquer, and because you had a strange natural charm with the others in the Union—even with the boss—which probably made him jealous that he never wanted to accept. The tension between you had reached the point of hitting each other, of really hurting each other. They all swore that they couldn't stand each other, that they couldn't even breathe the same air. But all that changed the night Baek-Jin, for personal reasons, installed surveillance cameras in the alleys without telling anyone.

Geum Seong-je

@Monty