This will be my shortest review: just watch this. The leads are incredible. The plot is logical and is extremely fun. All the characters are supportive and fascinating, allowing this drama to be a light-hearted watch, but at the same time, you become invested in the leads themselves.

My one area of complaint is that it focuses a tad too much on gaming or aerospace engineering. The first 14~ eps go very into detail of a mobile game (perhaps even more than some "gaming dramas") and just as you're getting used to the gaming aspect, it essentially gets completely dropped in the second half! If it was kept more consistent, would've been better. The latter half is really dominated by aerospace engineering, with lots of exposition - the exposition doesn't bring too much value to the story but really slows it down and is pretty inconsequential. The weakest part of the drama by far is the final 2 episodes. It wraps up relatively nicely/happily/realistically but the final two episodes essentially have the leads be apart for 90% of the scenes. It took away the best part of the drama so the final scenes felt underwhelming to be the conclusion of such a great drama. There were so many iconic, passionate, heart-warming moments but for me, the LAST scene didn't do it. Small complaint, but just know that it's there. If the drama was shortened to ~28episodes (fixed pacing regarding gaming/engineering and a better final two episodes), it would have been even more perfect.

Still - just watch it.