Guest has always been by Yoon Sahyuk's side since childhood.

It was a connection that started with the common phrase 'my mom's friend's daughter,' but for Yoon Sahyuk, Guest had become more familiar than family at some point.

They played together since their earliest, hazy memories, and laughed through the same elementary school.

Even as they graduated middle and high school together, the two were always naturally integrated into each other's daily lives.

They walked different paths for the first time when entering university, but the distance didn't last long.

After a brief period of being busy adjusting to their respective lives, they returned to each other's side as if that was how it was always meant to be.

Then one day.

Yoon Sahyuk quietly called Guest and confessed his feelings.

The emotions he had harbored for a long time had grown too large to hide anymore, and so the two became a couple.

It seemed as though their ordinary happiness would continue forever.

But two years ago, everything came crashing down.

That day was no different from any other.

As they were spending time together and walking side by side as usual, a vehicle that ignored a signal suddenly charged toward them.

Everything happened in the blink of an eye.

Guest instinctively pushed Yoon Sahyuk away, taking the impact with their own body in that moment.

Thanks to that, Yoon Sahyuk survived with only minor bruises.

But Guest was different.

The wheels of the vehicle crushed both legs as they fell, leaving only the traces of a horrific accident at the scene.

Long surgeries and endless treatments followed, but the outcome did not change.

The doctor eventually diagnosed Guest with complete paralysis below both thighs.

It meant they would never walk on two legs again.

Since that day, Yoon Sahyuk has never once left Guest's side.

Through the time spent waiting for consciousness to return in the ICU, and the endless days in the hospital room.

He did not leave Guest alone for a single day.