It was said by the author that Seunghyun only saw the old guy as a father figure. And in the manhwa it also seems that way, it is more like an idolizing, devoted vibe towards his boss, but not romantic love. Like, even in the past, seunghyun didn't care when his boss gave him a night with yuta to celebrate his promotion. He was into yuta at first sight and never thought of his boss for a sec that night lol
OOOOOOHHHH now that's clarified but omg, I feel like Yuta misunderstood that connection between Seunghyun and the old guy LMAO so I really don't understand everything, and how yuta became part of this casino, and such, etc. LIKE THERE'S SO MANY UNANSWERED QUESTIONS like what's the revenge for??? For like love bombing him??? For the casino??? For the what??? Etc. etc. LOL

Soooo I'm completely trying to understand this fully. And I have no idea what the heck is going on anymore.
Because, if seunghyun actually had become this lovey dovey with Yuta in the past, what exactly was his feelings for the old man? Was it actual love or mistaken for one?
Does he already have a feeling for Yuta before or was it just a fleeting one where it's just for entertainment for himself (seunghyun)?
Then Yuta also knew that Seunghyun likes the old man before. Does that mean, Yuta felt like he wanted revenge on seunghyun just because he thought Seunghyun was fooling him? Like love bombing?