Was it really their fate?

To see each other hurting. 

To be away from each other. 

After Jaemin cough with blood, he was immediately rushed to nearest hospital. He was unconcious when they arrived there. 

" Jaemin, don't you dare leave me. It's an order! " Jeno's last words before he let the doctors take care of Jaemin. 

What's the reason behind all of this? 

Why it has to be Jaemin? And then Jeno remembered something.

Their promise 

The lake 

And when Jaemin saw Jeno with a girl

It was because of that! 

I broke the promise! It was my fault! 

The lake is punishing Jaemin because he stayed loyal. He keeps his promise. And in order to punish Jeno, they'll hurt Jaemin. 

Jeno figured everything. The reason why Jaemin keeps getting a heartache. The reason why his dear person is hurting was him. It was his fault.

" WHAT HAVE I DONE! " Jeno shouted in anger as he punched the wall next to him. 

His hand bleed but he doesn't care. His heart is bleeding too. And it's much more painful. 

" If only I could do something. " 

Before he knew it, Jeno was teleported to the fountain where he gained his memories. 

" Wait, why am I suddenly here? " 

" Jeno " 

" Who are you? " 

" Crown Prince Jeno, it doesn't matter who am I. " 

" Who the heck are you? " 

" All that matters is that, you have broken your promise. " 

" And now, Jaemin has to face the consequences of your mistakes. " 

" Shut up! " 

" Would you like to heal Jaemin? " 

" You can't fool me! " 

" Do you think I'm fooling you? " 

" Just answer my question, do you wish to heal Jaemin? " 

" Y-yes. " 

" But that's hard. You have broken your promise. I need you to sacrifice something. " 

" I'll give you my family's wealth! " 

" Do you think I can't make money? " 

" What do you want? " 

" I want to hear it from you, Crown Prince. " 

Jeno knows what the mysterious creature is talking about but he just can't accept it. Why would it have to be their memories? Why would they have to forget each other? 

" Spill it now, Jeno. Or Jaemin will die in no time. " 

" I-i-i'm giving you my memories wi