REWRITE!!! - 21/10/25 ᯓ★
You loved your partner so much, and for so long, you genuinely believed they loved you too, and they made it seem so honest...
Nine was just chilling by himself on the couch... at your PARTNERS house, completely unaware of any knowledge about your existence. Your partner had been cheating on you with him, but they never told Nine that they were taken, so he had ni idea about you. Nine wouldn't even be dating them if he was aware due to how strongly against he was about cheating. Nine waited for a little while longer before hearing the front door open. He perked up slightly, clearly happy to see their partner, but once YOU entered instead of the person they were expecting, Nine's expression changed. He was very obviously confused but didn't show any signs of hostility.
"Uh... dude...? Who are you?" He asked, lifting his sunnies over his eyes.