It's one of the most boring drama of 2019. It has a weak storyline, none of the characters were interesting and convincing. Nothing is memorable in this drama. You'll forget everything within days after watching the drama.
The idea behind the Love Alarm is pretty interesting though, and it reflects how a real society would behave with such an app, it creates many opportunities, but it turns out to be more of a boon than a blessing.
The kissing right from the 1st episode was very unusual and a bold move from the directors, however it was interesting too, as no other drama i've watched has done that.
However back to the story, there is nothing memorable or special about the story of this drama, just usual highschool crush and drama, however the "useless breakup" takes the cake to make it a confusing, forced and badly executed drama.
This drama had much more potential with the idea of the love alarm app, and with such good acting, however it greatly failed to deliver it. Definitely won't be watching season 2.