Yoona didn't want him to leave, but Taecyeon had plans for their future.  In order to make them into reality he needed to serve his two years of mandatory military service.  She would wait, he prayed.  She had to wait!

"Don't make this harder then it needs to be …"

A coy smirk sprang across her lips, which he was oblivious to since her face was buried into his chest.

She seductively swayed against him, maneuvering her tummy so that it pressed against him.  

"Don't make what harder?" she asked in feigned innocence. 

And instantly his lower body sprang to life, as if commanded to do so by her.