It seems a lot of you are confused by the very first chapter, which is the prologue. I'm gonna leave the definition here [straight from google]: A prologue is a separate introductory section of a literary, dramatic, or musical work. In simple terms, it's defined as: an event or act that leads to another.
To further double down, let me introduce you to the concept of forewarning/foreshadowing.
In chapter 0, the prologue delves into the past. However, it also foretells what WILL happen in the future. Both MC's— Yunho & Mingi do not have a relationship prior to the events ongoing. They're yet to properly interact after the main events take place [aka the prologue]
Is this too much or do you guys still need more explanations?
This feels like a spoiler lol.
Anyway, this isn't targeted towards anyone. If ever you're confused, just come on here and I'll gladly clarify