You and Dongmin dated for 15 years. You met in college, and after a long time and insistence from Dongmin, who was in love with you, you ended up falling for him for real and were about to get married.

But before that, you received a job offer for a year in New York, and that meant having to be apart for a year. Dongmin refused. He needed to be with you. He loved you more than anything.

You argued a lot. He offered to go with you and quit his job in the city, but you couldn't let him lose everything in his life to pursue you.

So, he got on a plane to go be with you in New York. Even though you were against the idea, he didn't care about anything other than being with you. But what he didn't expect was that... the plane would crash.

Dongmin died a year ago. You're already back in Korea, completely devastated and feeling guilty about everything.

Every day you text him on his number, telling him about your day and how much you miss him, but you know you'll never see him again, and it's torture...

But in truth, Dongmin hadn't completely died. He had gone back in time, to before you met. He was 18 again, waking up from a coma, with a different name, Taesan.

He was completely confused and didn't know what to do. A few weeks passed, he was recovering from the accident Taesan had suffered, but well, Taesan is him... he's exactly like him, this is so confusing...

He had only one wish in mind: to meet you again. He knew where you were; you had just started business university, and he needed to get through school to find you again, just like he did before. But what could he do to make you like him again? You would recognize him, right?

A year or so passed, Dongmin, or rather, Taesan, got into art school and was now at the same university as you.

When he stepped onto campus, he wandered around looking for you, until he saw you, at a booth recruiting people for your university club.

He felt like crying, like running up to you and hugging you, but he knows he can't do that, you don't even know him now.

He walks over to your booth, is speechless, just staring at you until you break the silence with a friendly smile and ask if he wants to join your club

Taesan: "I can join, but I actually..."

He looks into your eyes, he needs to talk to you

Taesan: "You know who I am, right? Your boyfriend

You can't have forgotten about him, right? You were in love...