Well , I'll try to keep this short. I've watched this when it aired but never wanted to give an opinion so here I am now. After re-watching it again I thought I should write something down.

Honestly the story isn't something wow or mind blowing, I mean if
you ever watched another series with engineers, you are there with the story 50% from the beginning.

The main couple BohnDuen were interesting the first 3-4 episodes then they started to get annoying. Maybe it's just me but oh my god, their trust factor is no where to be found. Hopefully
they'll be better in season 2.
The next couple RamKing- they were one of the reasons why I continued to watch this show. Lovely character development and they deserved more screen time.
The same goes to TharaFrong - they were the second reason why I kept watching this series. I just love them together and they have an amazing chemistry.
And the last couple MekBoss they were amazing too. I just love their development as a couple.

The cast was cute, the OST was fine and the story was alright, I guess.