you are an employee and beomgyu is your boss and also your ex bf you still have feelings for him and he does too, but you didn't know he does because he already has a girlfriend.

one day you wrote something in your diary and you just left it there for lunch

" good for you, you look happy and healthy not me if you ever cared to ask, good for you doing great out there without me. god, I wish that I could do that... "

at lunch he was passing by your desk and saw what you wrote