Based on EXO's song Each chapter will featured different member as the lead and OC  

A quick one shot ( maybe a two-shot ) of my all time favourite OTP Yoonhae ..... Yoona and Donghae have been dating for years and still counting. Donghae sees only Yoona and same goes for Yoona.  What will happen when a third party appear in their relationship? Will their relationship break or will it still continue counting?