@addicted I read the light novel, I can add a bit to what has been said by jisoo's wife, even if I'm not sure everything will be in the manhwa.
Spoiler!
When Sang-Woo goes to the bar, it's on Yuna's advice, which he stupidly follows. The goal was to go to a bar while Yuna would send a photo to Jae Young after a while to tell her where Sang-Woo is. She sends the photo very late, more than expected, and Dang-Woo has no battery, so he waits a very long time. He drinks way too much and that's why he allows himself to be approached by another man (who had already tried it earlier in the evening, but had been rejected). If they fight, it's because Sang-Woo realizes he can't go any further with him, because he's only attracted to Jae Young, and the other man doesn't agree with his change of heart and seeks to sexually assault her.
Jae Young will intervene at this time, after having tried to reach Sang-Woo for a long time and having visited all the bars in the area.
Then, they have difficulty understanding each other, out of pride and lack of communication. Jae Young feels betrayed because Sang-Woo let himself be approached by another man, and Sang-Woo still doesn't understand that Jae Young loves him.
Jae Young will intervene at this time, after having tried to reach Sang-Woo for a long time and having visited all the bars in the area.
Then, they have difficulty understanding each other, out of pride and lack of communication. Jae Young feels betrayed because Sang-Woo let himself be approached by another man, and Sang-Woo still doesn't understand that Jae Young loves him.
I can still tell the rest, but we'll stop there, I'm not going to spoil the pleasure of discovering the rest. ☺️
