I'm Vietnamese, and English was my second language so I can only check if the translation is correct but cannot translate it by myself.
Here is the full correction with your original translation as well (sorry for using most of your translation without actually translating it by myself).
Tsuji: Hey, after the trip to that abandoned tunnel yesterday, is there anything strange happening to you?
Haruma: What could be more strange than being followed by a female ghost with her head upside down?
I thought I had died already.
But what happened to you?
Tsuji: This morning while I was getting dressed, I realized...
There were handprints on my hip as if someone grabbed it from behind.
Even though there was no feeling of being touched. Therefore, this could be the remaining traces of being approached by a ghost.
You can see the curse as a black shadow form right? What do you think about these handprints?
Sfx: Handprints? On the hips... Hmmm
Definitely from mine?
Haruma: Erm... Are these handprints on both sides?
Tsuji: Damn you seem to know about this too much (this phrase might be the VNmese modification; I did a check on the Jp ver and it said "How did you know that"). It makes sense since you can see things that I can't.
Haruma: IT'S DEFINITELY MINE.
Eh chotto matte, should I tell him? (I checked on JP ver and it was Eh, eh eh~~~~ Is it better to tell him?
He might go insane for real.
Tsuji: Don't give me false hope.
Haruma's mind: But... if it goes on like this... I might get taken to that tunnel again.
Don't wanna play this hide-and-seek game anymore!
Fine, just say that already!
Haruma: Eh... erm... well... These handprints might be... that perhaps...
Tsuji: What? Speak up, I can't hear anything.
Haruma: It's because...
How can I say... well...
Thank god it is not because of the curse or abnormal things. Right??
Tsuji: Look away...
Haruma: What?
Tsuji: Yesterday, you kept saying you wanted to see my face.
So, at that time, look away (it's mean he tried to turn his face away from Haruma's view)
Haruma's mind: It reminds me... at that moment...
Haruma: Hey, look over here
Let me see your face
Tsuji: Shut up
Haruma: Tsuji
Tsuji: So annoying
Haruma's mind: SO THAT WAS NOT ME! THAT CREEPY!!!!
Haruma: Salt! Sprinkle with salt!!
Tsuji: Hey! Don't throw it over here! And why do you have salt?!



The whole manhwa is literally about trying not to sick duck seme LMAO