Yoonmin is a very sensitive girl yet she always hold back her tears in front of people. After Zelo came to school, she met B.A.P and Yongguk adopted her as his sister and Yongnam is also helping him to take care of her. But she haven't open up to them. She falls sick easily as she have weak body and always doesn't eat as she doesn't have any appetite. Soon, she got found out by her classmates that she got adopted by Yongguk. What will happen to her? Will she open up to them? Read on to find out^^