See I don't blame Sang-Hee. He already has sh*** rumors going around about him. Keep in mind when he was Filipino with Phillip he felt that during the second film. Someone else was acting as Phillip. He also has a stalker rn if ya remember so of course he's on edge. He's paranoid because the dude he's sleeping with is the brother of the one he loves so when he thought he heard him at the studio he completely panicked. Accusing other dude because wtf why would he be there. I get why he's so timid right now and I don't blame him. He isn't completely innocent cause I think he needs to let blonde dude go. But he just doesn't want the image he created get destroyed once again. Especially not the one he put on in front of his crush.