i've been trying to find this fanfic i've read ages ago where sehun and luhan were in a complicated relationship (there's millions of them i know)

like okay... i skipped most of the story and lets just say i only remember the ending (which made me cried alot) (TT^TT

so......hunhan with their company and business stuff [think sehun was the CEO or something similar]  involve but they love each other (not sure if their was a fiance in the story)

so more stuff happend and they decide to go live together far away and Sehun told Luhan to wait for him like he said 

promise to wait for me, i' have to go back and finish every thing up and then i'll come back to you.... Sehun did come back but it was when they were really old like in their 60s or 70s and there was kids running around!!! so i was like WTF!!!! O_o. But they still love eachother so i'm happy with that but it actually made me want to throw my laptop out the window for a momen there!!!!!!!! (>n<) *pouts* 

please help <3