
The story is focused on their relationship and not his idol life but the beginning. Seoil said that on Twitter.
This story takes place in Korea and is wrote in Korean. One actor a few years came out and was fired. Look up: Hong Seok-cheon
If Hangyum comes out he will fired among other things. That is why Eunho and jisu wants it hidden as well. Hajin even makes a comment in chapter 15.
I read a couple had sex in the military. They both were arrested. I think one served one year of Jail time.
Also. Tapas has changed and alter this story. Hangyum is into women but fell for Hajin. Tapas made his sexual orientation being homosexual at the end of this story. Hangyum is more demisexual or pansexual.

I understand your wishes but I understand what would happen to them with how things currently are in Korean.
They would lose their jobs among other things. https://www.google.com/amp/s/www.bbc.com/news/amp/world-asia-49751410
We can see what idol struggle in their life when it comes to relationship. If you read until the end, the story were not focused on the paparazai or the fans. Even Hagyum never come out publicly, his still having difficulty about his relationship with Hajin.
Same goes to other idols out there who still in closet. I wish idols could be more open about their relationship and sexuality without giving a fuck about others people.