
Pleaseeee hyeol and jeonghan get together in the future

Actually the author leave it to our imagination abt this. Since their part is just an extra/side story from the main novel one.
SPOILER (it's from the novel and it's not in the manhwa yet)
When they're teenagers i think in highschool/? They (kotsu and gyeol) gonna confess to jeonghan (in this timeline jeonghan second gender is gonna be an omega) and they make promise if they turned 20, jeonghan gonna decide which one he want to be with~

Is it like yours to claim??? Is it good???

Definitely not. Wet Sand is better developed and each character has their own story and a place where each contribute in the plot one way or another. The love triangle is definitely frustrating (mainly due to the fandom) but each male lead is different on how they reaction to their emotions and desires.
THIS BITCH!!!