I'm a bit confused with the timeline-

This is when director(I forgot his name) have a crush to doyun that's mean it's a past before they got together

Sorry for my grammar

Right now its a flashback to around the first time they met :)

Yeah I understand that it's a flashback, but in extra 2 Doyun was doing overtime when the director went back home, so, how did Doyun get inside the house faster that the the Direction? Or it's just because the extra chapters aren't continuous?