Definitely.

So, days pass and he gets the confirmation that ye, the Emperor really took him in as his new 'toy'. And he doesn't like it at all. But there is one thing he likes even less: the more the time passes the more it seems as if LianBi is developing actual feelings towards him.
What started as a sex-only thing quickly took the features of a relationship. Cuddles, hugs, kisses... the Emperor even stayed to sleep with him a couple of times. Rank quickly incressing, manifesting in the form of much better meals, clothes, items and lots of gifts too.
In one week, Tero, or as he is being addressed 'Bang-sul', went from 'prisoner(?)' to rank one, top tier Imperial Concubine.

Now, that's literally what every single woman of the Harem, a good number of the women outside and also a fair percentage of boys would dream for, their whole life, but the same doesn't apply for him. If LianBi ends up falling in love with him, there is no way he will still be able to hide his identity and then? Even if he uses Gamja's lie, would the Emperor be willing to keep him, where he looks identical to his son's beloved one? What if Chang Mi saw him? As if being in the hands of LianBi didn't terrify him enough, all these complicated matters have to pile up. Karma is such a bitch, punishes you for all your crimes in the moment you deserve it the least.

But what is probably the worst part is: LianBi blinded him, scarred his face and almost killed him... but this one LianBi didn't do it. The LianBi who did it will never get to exist, as his son didn't die on that day. But still... it is him. Same person, same voice... same scent. See his dilemma?

Since he is always the same prideful bastard, he is still struggling beyond his possibilities in order to keep his blindness a secret. The only thing that could make the situation even worse to him would be to have some eunuch grabbing him by arm to lead him to the bathtub or to put food in his mouth.

Among the various things, he also started to feel rather sick. He thinks it's just because of LianBi, the bad memories and feelings that the situation is making him live again, over and over, but there is actually more.
He starts to feel terribly confused, but in a serious way. Like you tell him 'hello' and he answers 'i'm 33.'
His illusions too are turning weaker and weaker, last very shortly and take much more effort than normal to cast. He doesn't even manage to contact Gamja anymore.

In such state, could he manage to continue keeping his blindness secret? Of course not.

At the end of the week, LianBi comes to visit him earlier than usual, in the afternoon. He wasn't even warned about his arrival, thus he couldn't even prepare properly.
When the eunuch at the door says 'Jeonha is almost here's, he was at bed. He jumps up as fast as he can, making some little mess, to run to stand in the usual spot where he waits for him every evening: the wall opposite to the entrance, farthest possible from where he will come, back against the wall and head bowed. As usual, he doesn't bow nor greet the Emperor, although he knows he really, really should. He is not in a nice position, he had to confess many crimes, LianBi could choose to execute him anytime, literally.
He hears the steps and then smells the scent, giving him the confirmation that the Emperor is there , standing right in front of him, at close distance.
"I got something for you", says LianBi, in a cheerful tone.
Since Tero is usually an a**hole and that's something he would very likely do if he was in LianHi's place, he wonders if he means his d*ck...
"Won't you take it?" asks the other, somewhat impatient.
Ok, LianBi is more decent than him. Though, he can't see... so he joins hands together and raises them, as to receive whatever it is. He hears something falling on the floor, close to them. Damn, he thinks that what the Emperor has to give him fell, so he quickly kneels and starts to search the floor... but aimless, as he can't guess where it is, exactly.

He can't know that the item is actually still in LianBi's hand, who is looking at the scene In disbelief.
"Bang-sul... what are you doing...?" asks the Emperor, placing a hand on his shoulder.

Tero overreacts, he is feeling panicked again and totally out of balance. He gets away from LianBi's grip and quickly stands up, starting to run towards the other side of the room. He is lost, he can't orientate and ends up tripping against the short table, falling and causing the pottery on it to get smashed on the floor too.
Just a moment before placing his hands on the broken cups, he gets grabbed by LianBi, who pulls him up in his arms. He brings Tero back to the wall and pins him against it, but not in a violent way.

That's the classic moment when all the flashbacks play in the Emperor's mind, to bring credit to the much-more than a doubt he got to see Bang-sul acting like that.
"A... are you... blind?" asks LianBi in a sorrowful tone, as if that awareness upset him a lot.
Tero tries to restrain himself, but ends up crying, very silently. He nods though, it's pointless to keep that nonsense up, it was too clear.

Silence.

Then Tero gets hugged, very tightly and warmly. The Emperor even places a hand on the back of his head.

They move on the bed, but just lying there, with Tero in LianBi's arms.
The Emperor puts something on Bang-sul's finger: a ring.

When the other leaves, Tero tries to cast an illusion to be able to see the ring, but he doesn't manage to. Something is really wrong, as if his powers had suddenly decided to abandon him.

~ The next morning, he doesn't wake up at the usual time. It gets so late an eunuch comes in to check if he is actually there, just to find him on the bed, unconscious, covered in sweat like running a terrible fever.
The euncub rushes to warn the Emperor, although he should have gone straight to the doctors instead.
In the throne hall, Sao witnesses the whole thing and restrains LianBi from rushing to his concubine, for the sake of his sons, to avoid to give them the impression to be careless towards the deaths of their mothers.
Though, Qing eavesdrops the whole conversation, both what the eunuch said and what Sao said to his father.

~ The doctors have absolutely no idea what's wrong with Tero. They can tell his whole organism is collapsing but they can't identify the reason nor a solution.
In a brief and rare moment of consciousness, Tero asks to call for Yang.
Tero only needs a sentence for him to understand who he is 'I chose his life. It is more important than mine.'
It takes a very short time for Yang to identify the problem, after being told this Tero comes from.a different time. And there is only one possible chance to save him: provide him with another jewel before he dies.