In the city of Seoul, a young man around 20 years old was lying down, awake but stayed there like a statue, lacking awareness on a hospital bed, with a ventilator.

"Poor young man, he was only 20 years old and yet..." The nurse sighed, looking at his face before turning towards a young man in his mid-twenties, and asked, "Oppa, where is Soyon-sunbae, and Daeho-sunbae-nim?" The intern replied, "They are talking to the patient's family."

Meanwhile, Resident Mae Daeho and the Head nurse, Lee Soyon were talking to a lady in her early 50s and a 16-year-old girl, who have a face mask, sunglasses, and a cap that lets her face hidden completely.

The doctor shook his head with a sigh, "I'm sorry Mrs. Han Se-Eun but it's already been 4 years. I think it's time for you to take him home. There's no use of staying him on a hospital bed and who knows, a miracle will appear..."

All of a sudden, the nurse, who was looking over the patient, screamed in surprise as the patient, who was supposed to be in a persistent vegetative state suddenly shouted with a laugh while raising his arms, "Yahoooo... I'm finally... What the..."

As he looked around, he found himself on a hospital bed while the nurses and interns there are looking at him in shock.

Then, all of a sudden, the patient clutched his head and screamed in pain while taking out the oxygen mask, "f**k**g s**t Argh..."

And then, he fell unconscious before the nurse and the intern who were near, hurriedly reached him followed by the mother and daughter pair who were running towards him, along with the doctor.

Meanwhile, the young man found the surroundings became pitch black while he was floating in space, he cursed out, "f**k. Not again. System? Oi System! Aria, come out."

A tiny girl that looks like a fairy appeared before him and asked, "User 00001, I'm here. Tell me, how can I help you?"

He asked, "Wasn't I just transmigrated, right now after waiting for four years in this space? Why am I back here again only a moment later?"

The fairy was surprised, "eh? That wasn't supposed to happen. Let me check..." After a long silence, the fairy spoke, "oops, it's my fault. I only synchronized your soul with the body and forgot about the memories. Wait for a second."

As her eyes turned golden, the young man started receiving memories that weren't exactly his.

A while later, her eyes turned back into the blue, before a smile appeared on her face, "done, you will be returned to the material world in five minutes."

Meanwhile, the young man was in shock as he was watching the memories like a movie but only in extreme fast forward. But, quickly, the shock was replaced by a grin as he gets the basic details of the body and the world he was transmigrated into.

"So, this body is also named Han Sung-Jun but only that it's an alternate world which is almost similar to earth? I guess the Multiverse theory is indeed true.

Now, this is one surprise. I'm a genius Kpop idol trainee who was about to be debut under ZC, one of the top entertainment agencies in Korea?

So, instead of agencies like BigHit, SM, YG, JYP, etc... There are ZC, Signature, Genesis, which are the big three? Moreover, my sister is Dahyun? Wow. Now, that's something…"

Before he further analyzed his memories, the countdown ended and his vision blacked out once again.

As his vision was blacked out, he felt someone is touching his hands, checking out his pulse, then, started feeling heavy, and tried to move his hands while opening his eyes as he heard muffled voices along with screaming…

"Jun" "Oppa" "Jun" "Ma'am, please calm down. Let me…" "nurse, increase the oxygen…"

Slowly, as time passed, the voices became clear while the screaming disappeared.

"Doctor, what happened?" Jun heard the voice of a middle-aged woman that was completely unfamiliar and yet familiar because of his new memories…

"Ma'am, don't worry. He's just asleep. Look at the monitor. His pulse, body temperature, blood pressure is good. Only the oxygen saturation level is low. That's why when he removed the mask with force, he lost consciousness…"

Listening to him, Jun thought, 'Based on the explanation, it must be the doctor.'

Then, a very familiar soft voice, light and fluttery in quality, was heard from another side, "But, I saw Oppa was grabbing his head. Is there something wrong?"

'Oh, this is Dahyun's. Hah! It's my first time hearing it so closely. She must be standing right beside me.'

He exclaimed inside before frowning as something clicked inside his mind, 'wait a second. How come, I can't feel anything? Is it because Dahyun is my sister? No, she's not my sister. She's this world Jun's sister.'

Suddenly, a few memories flow through his mind.

'Ugh… These memories… Is this why I'm completely calm?'

Meanwhile, once again, he heard the doctor's voice, "The patient finally had a response after 4 years, Ma'am. This is good news." "Thank you…"

"Nurse, update me when he wakes up again. And Ma'am, if possible, please try talking to the patient. In cases like these, it might help him respond to you with a touch or may even regain his senses, soon…"

A few moments later, once again, the voices around him started disappearing and he found himself in the familiar space where he spent for the past three years floating around.

Slowly, the time passed away but, the young man never opened his eyes despite his mom and sister talk for hours in the hopes of waking him up.

As the patient visitations are over, both of them left while he continued to stay unconscious with his eyes closed…

"Ugh…" Jun groaned as he slowly grabbed his head while trying to sit on the bed.

The nurse, who was attending nearby patients, widened her eyes and rushed towards him to support him while screaming for the head nurse.

The next day;

Asan Medical Center, Seoul;

In one of the wards, interns, as well as a couple of residents, were following a Professor who was out on rounds, checking the patients.

*Buzz*Buzz*

A mobile phone vibrated in one of the intern's pockets while the Professor is busy talking to the patients.

Looking left and right, she slowly took out the phone and glanced at the text message.

"Soyon-sunbae?" A frown appeared on her face before she read the message.

As soon as she read the message, the frown was replaced by a shock, and then, a wide smile, before she tried to slip out of there.

But, just when she was about to exit the ward, a familiar stern voice belong to a female professor was heard from behind, "Somi, where are you going?"

"Unnie…" her face turned pale as she turned around…