Please remember that this mini-drama (the running time is about 10 minutes long per episode) is a gigantic AD for Lotte Duty-Free Mall.
With that in mind I have to say the marketing team nailed it. And if you consider this, these little episodes will be enjoyable.
It has all the good aspects everyone likes in a drama: a star-studded male cast (there are seven of them if you didn't notice ahah), a lot (and a mean a lot) of cliches, also giving us those annoying endings wherein the end they almost kiss but never happens.
All the stories will feel rushed, but in the end, that is something to expect from an ad, the music from what I remember was alright, and the acting performances were great (I wouldn't expect less from these beloved actors) but nothing out of this world.
So if you like any of the male leads, enjoy cringing scenes, want something light, and have a couple of minutes to spare, I would go with this mini-drama.
The only reason I gave a low score is that in the end, this is not an actual drama and I dont really like super cringe scenes.

PS: Even if the title is 7 First Kisses, do not expect any.

To the question would I rewatch this drama, my answer is YES (only if extremely bored) .
(English is not my first language, so I apologize if something is wrong or difficult to read)