Why is everyone talking about Angel Buddy?

Basically, in chapter 66, it was told that there was a prophecy where Lee Taegun (the esper, black hair) would get hurt by being stabbed with a knife. That was done so by a creature that disguises itself by someone who renders Lee Taegun helpless, it disguised itself as Seo Eunsung (the guide, blonde hair). Lee Taegun promised himself to never hurt Seo Eunsung ever again, so he couldn't do anything to eradicate the creature in fear of hurting Seo Eunsung. And with that kind of prophecy, we think something worse is going to happen, like a death.

I know what happening in this story, but people kept mentioning something about Angel Buddy so I’m assuming they think something similar to whatever happened there will happen in this story. I’ve never read Angel Buddy so I have no way of knowing why people are reacting that way or what they think is going to happen, hence why I want to know what happened in Angel Buddy that has everyone freaked out.
Even though if I’m honest, even with the prophecy. I don’t think anyone is going to die.

Oh no. No. NOOOO. I AM NOT READY FOR THAT（/TДT)/

Firstly- that manhua is still ongoing (English version = raw) so I don't know why people already assume the plot will be like in Angel Buddy.
SPOILER
Secondly I still think Royal Servant was more depressing (yo me it was sad ending).
In AB was some...time distortion? Time teavel? Loop? I don't really know which one of english word fits the most. But still everything ended good. From what I remember the main characters was all alive in the end (in RS one of them died so...) We must just wait and see what plot we get this time. I like drama but with this pair I want already peace and love

I think it's mostly because the author does kill their characters, so it might just make it that one of the leads will die or something else just as tragic. ༎‿༎

Thank you!
Like I said, I haven’t read any of the author’s previous stories, so I have no idea why everyone suddenly started freaking out.
Somehow I’m not getting tragedy vibes from them. Sure, their pasts have been difficult and they’re still not quite on the same page, but narratively, I don’t think a death makes sense.

That’s why I wanted to know why everyone suddenly started freaking out. Thanks.
Narratively, I don’t think a tragic death fits Guiding Hazard. Both Eunsung and Taegun have enough tragedies to last them a lifetime, they don’t need to have one of them die to make a point. Heck, Taegun’s past is traumatic af and he already tried to off himself. I think the story is doing a good job of being tragic without death.

Oh my god, I'm so sorry! I completely misunderstood and though you wanted to know what was going on in Guiding Hazard, not Angel Buddy! It's been a while since I read Angel Buddy so I don't remember much but I do remember one of them dying and leaving their soul behind but then they managed to get him back to life? Don't rely too much on this explanation as I really don't remember much!! ╥﹏╥