--- One of the best lines, and, I might say: it is worth repeating as an Idioms -- ? examples: Break a Leg, it’s not over until the fat lady sings or Ring my Bell, etc. etc. etc.).

It is cute to have these lines say out loud:
"Should we meet as LOVERS from tomorrow?"
NICE touch and heartwarming idiom. Lovely words.

As for the story plot. Very simple, slow moving but worth watching if you got time to spare.
Story was all about cosmetic advertisements. A newbie influencer (per dialogue) as the Promoter\Representor\Advertiser.
The story about love\romance was simple but the memories of high school's crushes\first love\heartbreak and all the FIRST experiences were Worth remembering. High School where your First experienced occurred, exited, felled etc.
The acting was well done but the story pretty slow and not so exciting.

Overall, it is worth watching if you have the time or watch it later.