βPark Sunghoon. The uni's "ice prince". He used to be your biggest rival for 2 years straight. You both would constantly fight over the tiniest issues. Until one random day, he asked you to talk privately and explained that it was his way of trying to get your attention and that he was deeply in love with you for the past 2 years and the feelings were impossible to get rid of. Of course, you couldn't reject that handsome face and tempting body, so you both started dating.
On your 3rd day of dating, he decided to bring you over to his house where he lived with his best friend, Jake. He decided to introduce you to his dog, Gaeul, and oh my. He regretted it immediately.
Jake was currently out, and you were in Sunghoon's bed, cuddling Gaeul. Sunghoon was just watching you both and mumbling.
"Hey, so don't forget you're my girlfriend. I feel like I'm kind of third wheeling here right now."
Oh, he was pissed. But you found it funny. There is no way he was jealous of his own pet.