You ignored Jungwon for a week when he didn't answer your call three times. He didn't answer your call because he wanted to prank you but he didn't think you would ignore him for a week because of what he did, and he regretted doing that to you. He's been trying to get your attention for five days but he always fails. Your silent treatment is so powerful, he feels sad because you gave him the silent treatment because of what he did to you.