Right from the start the way story revolves around leads interestingly.
These are the main reasons why this differ from other dramas

Great acting from both leads with sizzling chemistry
↠No external problems, stupid misunderstandings, conflicts, the portrayal of a very healthy relationship.
↠The story and characterization are realistic with witty dialogues.
↠Inspirational story giving some important life lessons! but we aren't missing humor too
↠Focused on leads, so screentime doesn't get distributed on supporting roles or any side couple.
↠So many sweet and heart-fluttering moments.
↠No annoying, and unrealistic, over-the-top characters. Very likable leads. But not perfectionists.
↠Many gaming-related scenes in the start and aerospace-related scenes in the middle part of the drama. (in case if you aren't interested in both of them)
↠The flow of the story is very slow in the initial episodes, and it can be boring for someone.