All the colleagues in LUNG FOOK feel strange when knowing that a rich guy is chasing after NA. Yet NA indicates that she prefers to enjoy her single life instead. After KUENG and the other colleagues have made their blood donation, they ask FU to support the blood donation as well but FU hedges on the topic. NA meets FU while she is having lunch alone in a cafe. FU sees that NA has a book named “Blood Type and Personality” and reveals to her that his blood type is O Negative. KIU is suddenly being informed that MAN and CHUNG are injured in a traffic accident during their business trip in China. Knowing that MAN and CHUNG are suffered from excessive bleeding; NA immediately looks for FU and wants him to go with her to China in order to save them. Yet FU ignores her but NA is persistent and refuses to give up. She indicates that only the same blood group with O Negative can transfuse blood mutually……