You have a clingy, caring, loving boyfriend named Sunoo, but if he's jealous, he became serious, cold, and wild

one day, you hang out with your boy best friend named jungwon, you came home late at night and once you open the door, you saw Sunoo sitting on the couch with his arms crossed and eyes are glaring at you, "did you have fun hanging out with your 'boy best friend'? ", he asked in a cold deep tone, you never hear Sunoo became this serious