"Ünrequited First Loves and How to move forward ..." That is the theme of this show.

This show helps even someone who hasn't loved/been loved .. the pleasure's of a first crush. In a life filled with crushes you have no regrets..life goes forward.

I have never felt so better after watching a romance teen drama... On top of that it has light sports ; realistic to some extent

The plot is very (very) simple, yet very well written. The story follows Bok Joo; a young girl in the campus of a sports university (?), that happens to practice weightlifting. That’s nearly all you will get to know about weightlifting (it could have been golf and there would’ve been no difference, so worry not about the topic. I’m mentioning this because I know the “weightlifting theme” could been a throwback to some).
Bok Joo has a group a friends; a romantic crush; a family; a passion (weightlifting of course), all the things and problems that any standard teenager experiences. The hole plot revolves around her and (again) the normal things that could happen to a normal teenager. The difference to other dramas, is that everything FEELS real. And that’s rare.

How many times did we found ourselves hating the protagonist or wanting to smash the TV because we couldn’t understand the decisions they made? Of course, deep down we now the writer makes them do that in order to fulfill the number of episodes that they need. But nothing like that happens here. The characters (and their dialogues) are delightfully written; each one consistent with each personality (which are very rich and most important, real life people), and they are incredible lovable. The writer skillfully makes you fall in love with each one of them (including the ones you initially “hate”) because you get understand them all.
Also, the character development is done very progressively (although that doesn’t mean that the show is “slow”); I’ll assure you, you will enjoy every second of Bok Joo & friends, as they discover who they are, and who they want to be in the world.

The acting not only is superb (everybody does their job so well and they’re SO believable); but the chemistry between Lee Sung Kyung and Nam Joo-hyuk is one of the best I’ve ever seen. [spoiler]NJH AND LSK ARE DATING IN REAL LIFE[/spoiler]
I was really surprised by Lee Sung Kyung! At first I was really skeptic but despite her character being adorably written, she also does a fantastic job in making you believe her. Her expressions and her body language is fantastic.

The music is very good also, and it respects the tone of the series, really sweet, but it's something that I rarely pay attention to, so there's not much I have to say about it.

This drama accomplishes the (almost) impossible: It's sweet, joyful and innocent, (without feeling cheesy) and at the same time it's mature and realistic.

I definitely recommend this to anyone who is missing human interaction in COVID19 lockdown.