I don't think I've ever seen a show with such lack of development as this one. Characters are falling in love in lass than an episode, which translates to like one day in the story and nothing has a proper explanation. Everything just feels very cheap and out of nowhere. Also, 90% of the time you won't even be able to understand the motivations behind the characters' choices, which makes them look stupid and hard to relate to.

So you might be wondering why I didn't give a lower score to this drama. Well, in spite of its flaws, it's still entertaining. Even though Jojo and Sunoh's relationship comes out of thin air, they're still cute together and Sunoh is pretty supportive of Jojo. The plot sometimes touches really interesting aspects regarding the app and how it affects society and relationships and talks about sexuality, as well, but the writers don't really expand on these themes. The love triangle is surprisingly more developed in this than most dramas, since it shows Jojo interacting and having a good time with both leads to the point that it actually leaves you guessing who she'll end up with.

Jojo on the other hand is straight up a dumbass. I don't understand how the writers want us to sympathize with her for feeling sad and lonely when she was the one who did that to herself. Not to mention that she's a cheater and literally humiliated the guy she loved in front of the entire school and broke his heart for no reason at all.

All things considered it's not complete trash, but don't go in expecting too much.