Hetalia Fanfic: Forevermore (USUK)

"You were just a dream that I once knew. Never thought I would be right for you. I just can't compare you with anything in this world. You're all I need to be with. Forevermore."

Long and peaceful years had passed, after all the disagreements with their relationship, Alfred and Arthur finally can spend their time being lovey-dovey. However, Alfred notices how Arthur had been really listless. What's the cause?...

Characters: Arthur Kirkland is England/UK/Britain
Alfred F. Jones is America/US
Ivan Braginski is Russia/USSR