i had this on hold because i heard this was filled w angst and wasnt sure if i could take it, but i do regret not starting this drama earlier. the drama isn't "carried" by anything, the camerawork, soundtrack, and acting just make the story impactful altogether i'd highly recommend anyone to watch this prequel before the sequel (Forever and Ever) even if others say it's more interesting. it's not a grave mistake, since you can always revisit a drama to find the little connections. it's like a buy one get one free, where if you watch one of the dramas it's almost a must to watch the other.

STORY
at first i was scared by the age gap, but it is later clarified that there's only a few year difference. the story involves tragedy, but it is blended well with all the sweet and slightly comedic moments. romance wise, the main leads have outstanding chemistry and the side couples as well. there arent any absurd love triangles or moments added purely for fanservice that ruin the plot. the emotions and romantic moments are pure and just a joy to watch. watchers who only look for typical romance (kissing, consumating, marriage) may find this drama a bit different, but i think it's so pure that the gestures have more meaning. comedy wise, there are lighthearted moments but the show obviously isn't comedy based. i still think it's enjoyable to watch how peaceful life is when they're off the battlefield. it's enjoyable how the political/military aspects are relevant to the time period and historically accurate (dramas occasionally throw logic out the window for fanservice). i was always engaged in the plot and watching the characters gradually develop emotions/mindsets is worth it.

ACTING
a 24 episode tragic drama is a rare sight since theyre usually 50+ episodes, but the cast's subtle emotions and expressions perfectly convey the meaning of the plot. the development of the plot doesn't depend on out-of-character moments that defy the plot (like certain dramas..) but even their smallest gestures can evoke strong emotions. the main leads click very well, ren jia lun and bai lu are both notable actors who have had outstanding roles in other dramas before. the acting feels down to earth and realistic, helps watchers immerse themselves into the story. the supporting cast, especially the villains, add a great amount of impact to the plot. you know the cast's acting is well if you sometimes want to go through the screen to comfort and cry for a character or punch their face flat.

MUSIC
cdramas always have music that set the tone/mood for the next scene, and ive rarely ever watched a cdrama with a bad ost. one and only is the type of drama that makes its opening unforgettable. hearing it literally makes me so nostalgic (i only finished the drama recently) hearing the intro again in forever and ever literally made me gasp out of excitement.

REWATCH VALUE
i immediately rewatch dramas without skipping if i like them, one and only is not an exception. it felt taboo to skip any scenes because i knew what impact the story had on me. with complicated political dramas, watching them a second time allows you to understand little details and understand better. also being able to see the main leads happy moments is such a treat.

SUMMARY
please do not drop, or please don't turn away from the drama, i feel so much regret not watching this earlier. each character was portrayed perfectly by the cast, from heroes to villains. story is definitely engaging, and i just feel so much dopamine watching this.