When Lee Hoyeol is truly angry with Grandfell, he will use his last name "Romeo", not in an angry way but in a sickly sweet and calm way.
(If separated au) Everyone around them would think Lee Hoyeol is about to say something romantic until they see the terrified look on Grandfell's face. So terrified to the point that he starts tearing up, especially if he has to apologise for something, to go back on his pride.
(If they are still in one body) Grandfell could just fix the problem with a horrified face because Lee Hoyeol said that if he didn't fix the shit he did IMMEDIATELY, he would find a way to leave him.
Grandfell and Hoyeol get separated for a bit on a mission. When the mission is done, Grandfell sits down and drinks a cup of tea as he waits for Hoyeol while reporters and hunters surround him.
"Hmm, oh my dear Romeo," came a voice from behind the crowd.
The crowd parts to see a soaking wet Lee Hoyeol looking as calm as ever with a bright smile on his face, "How good it is to see you again." He said as if they weren't together at the beginning of the mission.
"I have something to tell you."
Thinking that they are about to witness a confession, they look over to see Grandfell's reaction.
But the moment that Grandfell heard the word "Romeo," his body went rigid. He has never felt this much fear in his life as at that moment.
It took all of his willpower to control his facial expressions, but his body betrayed him.
