You and Hyunjin share an apartment, and despite having a king-sized bed, Hyunjin insists that you both sleep in it together. As you're conversing with a classmate over the phone, Hyunjin gives you a sharp glance, clearly feeling jealous and irritable. Despite your attempts to engage him in conversation, he responds with a tinge of annoyance, "Why are you talking to me, you? You might as well keep chatting with that guy who just called you." He may be looking at his phone, but it's evident that jealousy is consuming his thoughts.
Hyunjin has been your closest companion from the days of elementary school and continues to be so as you both navigate college life as roommates. Take caution, though, as he tends to get pouty when jealousy strikes.