First and foremost warning: Watch it at your own expense!
When I saw the poster and synopsis stating that there are 4 young Onzoshi (meaning son of a distinguished family) for 3 high school girls, I smelled something fishy about it. And that is the plot of this drama.
Unlike most of my reviews, I will stated what I don't like first then what I like, so you don't need to waste more time to read as you wish.

WHAT I DON'T LIKE ABOUT THIS DRAMA:
(-) Bad story especially how it turns out. I am not discriminating against age or gender, but it seems like the story is written by a high school girl for a school project. Signs: recipe how to make peeled orange snack and Yu's make up tip to name a few.
(-) This drama seriously need a PG, Parental Guidance, lol. Not because of violence, language, drug, or nudity. But because of the message given. If you are in age who can give advice to teenage girls, please watch this drama first before recommending it to the youngsters.
(-) The message taken from this drama can be toxic to teenage girls. Mugi's written reason in the contest application: "A girl's life is decided by her marriage. Even if I get into a good university I won't have a stable future set for me. I want to find a marriage partner with high specs and get married to him!" (English sub) Or Yuu's reason: to make her mom happy. Or Fumino's reason: to revenge her past bullies. The drama message can be positive IF the ending is different than I expected... but read the next negative point below:
(-) The ending! I am a sucker for happy ending and wickedly cheat to find out that every drama I want to watch end happily. This drama ends happily alright, but after going thru the turmoils I rather not seeing a happy ending. Especially not for the main FL. She better walks out being single and establishes her own career as a dance coreographer. Or even a time lapse that in the future after some growing up process she meets one of her guys again giving out a possibly for a happy ending or an open ending. I will still accept that.
(-) This drama stole some ideas from Hana Dori Yango franchise: 4 young, handsome, talented, rich guys; poor childish FL, FL from food business family (Meteor Garden 2018), cold mean ML, FL likes someone first ends up with another, FL rides bike, FL is underdressed in a party, FL fell into the pool, FL cannot dance ends up stepping on ML's foot, boys in the swimming pool (MG 2018), FL wearing wedding dress, competing first and second MLs, long time boys friendship, long time female friend for the boys, rich mean female villain... too many not to notice the HDY replicas. I will not complain if this drama is done right, but since it is bad this is straight an insult to the classic HDY.
(-) The cringey scene with girls wearing wedding dresses. It does not matter what religion/belief, cultural background, or situation is, wearing wedding attire is to be taken sacredly and seriously unless for modelling or acting purpose.
(-) The unnecessary scenes with half naked boys. First scene (Riku) okay... she needs to see that; second scene (in the swimming pool)... copying Meteor Garden 2018, anyone??? third scene (in the sauna)... wow!!! OK I get it, the drama is targeted to squealing teenage girls.
(-) The main couple chemistry is bad. I though I saw some promising spark when ML and FL look and smile at each other for the first time, but disappointing after that.
(-) The boys' acting are mediocre. Since now the boys are maybe too old to act in future Kamen Rider shows, they better work harder if they want to act in other genres. Only Iijima Hiroki acting as Taiga is okay IMO.
(-) The boys' costume (mismatch prints???)

WHAT I LIKE ABOUT THIS DRAMA:
(+) Fast paced, easy for binge watching (18 episodes x 15 minutes = 4 1/2 hours)
(+) Some funny dialogues and hilarious scenes (although drama cliches)
(+) The friendship between the Mugi, Yuu, and Fumino, and the sisterhood between Mugi and her dance crew.
(+) The second and the third couples, which develop naturally. The second couple's chemistry is good, and the third couple's chemistry is okay
(+) I watched this drama solely for the actress Taira Yuna who is adorable in the lovely movie Honey (read my review about it). She surprised me she can be a hilarious comedian, since her role as Mugi here is straight stupid, naive, yet comical and hysterical.
(+) The other actresses' acting are good too.
(+) Beautiful scenery and scenes in the winter resort