Okay kiddo, so in Bulgaria, some people love other people of the same gender, just like some people love people of the opposite gender. But in the past, a lot of people in Bulgaria didn't think this was okay and didn't want to give these people the same rights as everyone else. For example, they couldn't get married to the person they loved, they couldn't adopt children together, and some people treated them very badly because of who they loved.
But, over time, more and more people in Bulgaria realized that it's not fair to treat someone differently just because they love someone of the same gender. So, they started to fight for gay rights, which means that people who love someone of the same gender should have the same rights as everyone else.
Some people in Bulgaria are still against gay rights, but there are also many people who are fighting for these rights. This is a very important topic because everyone deserves to be treated equally no matter who they love, and that's what gay rights are all about.