Turbulence

Seonghwa's scrolling down on twitter when he sees an article about a subway line in Seoul - where he lives - being interdicted. He starts to read the article, unbeknownst of how that action would change and save so many lives.
Later that day, after dwelling on it for way too much time, he shares what he read with his partner, and, after they make all the preparations they need for the next day's party, they go to sleep soundly.
Not even 24 hours later, they found themselves grateful for all their worrying - since that what was saved theirs and their friends' lives.