
I'm confused... did he show him an alternate version of the past or something? Bc this wasn't a real memory so wtf is it??? Is he planting fake memories into this guy?

You're right. Even though the future has been changed for the better, I still feel like something bad will happen to them because changing the future does have a price. And unfortunately, I think it will be at the cost of the life of someone Baekyoon loves.
So yes, someone could be seriously injured or die. Despite this, KimHeon is the only one who could save lives because he has the sphere of protection, but he doesn't want to learn how to use his powers! he wants to continue living as a human, stupid (╯°Д °)╯╧╧

well the uke has another vision that he shouldn't worry because everything will be okay. so I guess there might be bad things but not that bad.
And remember when uke's father told the seme that he can't explain really well what the exactly the seme is because even if he has the beads of protection, he still got hurt when he protected the uke from a fall. so maybe he has a bead that makes him not fully human but maybe he doesn't have powers to control it since it's not his in the first place or it loose it's purpose when he got saved from the car accident (fed to him from his black fox mother)

I've been thinking that he could train his powers and enhance the magical strength of his bead to its maximum again yk? just like the maegu leader did. But if he continues to stubbornly ignore the importance of his powers to protect his family from the fox leader, when he needs them it may be too late. Perhaps Munham will suffer in the process.

the thing is they wouldn't even know how to train his ability even if he has because they didn't even know what he is, and only the fox leader could answer it because he possess the seeing bead. And on Chapter 68, Muhwan mentioned that maybe the seme is an ordinary half blood and the guardian star that his mother gave him vanished after the accident. But I kinda get that they should plan on how to take down the maegu fox leader and his greedy family knowing that they will not stop until they get what they want and not just wait for the enemies to make the first move.
maybe they will reactivate their abilities when they really needed it, cliché

We don't actually know if Munham doesn't know how to train his abilities. Maybe Munham has some way of knowing or finding out since he lives with other foxes. So it would be prudent for KinHeon to want to know everything about his magic so he can protect his family because he knows that the Fox leader is constantly after them. Being just humam, he can't think that way anymore, now he is and lives around magic, it's stupid to want to continue being ignorant of his own magic. he won't be able to do anything that way, it's pissing me off lol.
Another thing is that I don't believe that the seme is an ordinary half blood and the guardian star that his mother gave him vanished after the accident. It weakened when it saved his life when he was little but it grew along with his growth. So I think the magic is dormant and needs some emotional shock to wake up, that's why he didn't heal when he fell down the stairs with Baekyoon. We're seeing that Gieyoon has powers. He communicates with animals, so he's a fox. For that, both parents need to have a bead and be a fox. We've already seen that Baekyoon still has visions. Now we just need to see KinHeon manifest his protection powers. As you said, I also think the author will use the cliché of activating this ability when he has to save his family from immediate danger (emotional shock).

The 'sex' scenes are so booty in this. I feel like all their chemistry vanishes and the pacing is kinda strange. Maybe bc it's the ML's true personality coming out idk. I wish this would focus on their other interactions cause those have a little more interesting tension and butterflies, it feels like the ML is courting him or showing him off to the others and then I want to actually root for them lol
they need to at least convince him to see a doctor even if he won't lose jiheon. My poor bb. I hope it's all reversible