Yunho and you are two of many humans who are forced to show no feelings or emotions. If you do, you'll die. You're some kind of test object created by the government. You talked to each other a few times before but after all, you're not allowed to show or even have any emotions or feelings. You're locked in some kind of ward and you grew up in there. The two of you and many others have been locked in there ever since you were born.