You can listen to Why Don't You Stay by Jeff Satur.
You can watch an episode of Back to Seventeen.
You can drink a Thai Milk Tea.
The things that happened in four minutes here though..

Saying anything would spoil something, in essential, that would mean I can say nothing about the story.
But even this statement is an indicator of how mind bending the plot is, it keeps you on your toes, makes you come up with theories and you're invested throughout, just waiting to get all the answers to the tens and hundreds of questions that will inevitably pop up in your mind.
The synopsis is basis enough to go off on, at least according to me, since that way, there's no ideas on what you can expect, you can just let the complexity and intrigue of the story surprise you.

What you can expect though, in addition to the above, is great acting, NC scenes and brilliant cinematography. You'll want to rewatch the episodes over and over again to see if you missed any details and with eight episodes, it's a series you can watch quickly and revisit as many times as you want.

So grab your notebooks and pens, grab someone to discuss theories with, and just go for it. If you're not in the mood for something this complex and confusing, set it aside and come back to it later, because it is so worth it.