
I still don't understand why he got his jinx because of Woojin did someone put a spell on him or something?

Is it a trauma then? He had a jinx because someone saw them kissing and the fact that they are both guys?
Sorry I'm just confused since I'm not really familiar with jinx, I actually searched about it yesterday and said that it's bad luck.
I just don't get it if he got jinx because of trauma, or someone intentionally made him like that...

Why no one is talking about "the friend" who is in a relationship with his father?

They're talking about Koganei and his father. If you thought this manga was twisted, Koganei and his dad are even more so - http://www.mangago.zone/read-manga/kusatta_rasen/

https://www.mangago.zone/read-manga/ienai_itami_o_daite_iru/bt/259471/Ch0/7/
That long blond haired boy

Sorry it is the page before this one and the story of him and his dad is
http://www.mangago.zone/read-manga/kusatta_rasen/

I'M SOOO HAPPY IAN REJECTED TO COME BACK WITH MR. RAYMOND...
AND MR. RAYMOND OH HIS FUCKING KNEES, CRYING AND BEGGING IS SUCH A BLESSING IN MY EYES NOW YOU KNOW HOW IAN FELT EVER SINCE...
AND IAN UP UNTIL THE END IS STILL SO KIND, HE STILL WANTS MR. RAYMOND TO FINISH HIS REVENGE SO THAT HE WON'T REGRET IT AND STOP TO REPEAT THE CYCLE OF HATRED...
TELL ME THAT THEY JUST SWIM INTO THE OCEAN AND DID NOT COMMIT SUICIDE...
JUST TELL ME PLEASE! BECAUSE WHEN I SAW THEIR SHOES AT THE LAST PANEL, I REMEMBER WHEN THE SEME ASKED LIN QING TO RUN AWAY TOGETHER
(is that their way of run away or i'm just hallucinating)
It’s an open ending, you’re supposed to be the one who decides how you interpret the last panel. but from their conversation, they don’t seem like they’ve committed suicide, but maybe simply have enjoyed the sea like what the uke couldn’t do for the longest time
ohhh it makes sense, thank you so muchhh