They were the best of friends, albeit having an of 4 years apart.

"I promise that Oh Sehun will forever be in my heart, be it 10 or 70 years later."

"And I promise that Luhan will forever be in my heart, be it 10 or 70 years later."

Of course, just like any other tragic love story, something dreadful happens.

But as long as they lived on,

the promise shall never be forgotten.

..........Right?