sassy go go original part : Kwon soo ah feels very depressed and upset , after receiving critisisms from her classmates about her, putting a usb containing answers of their english test to kim yeol 's bag and pushing him down the stairs  . The pressure given by her mum drives her crazy , and turns her to a monsterous girl . Although she hates being monsterous , she can do anything to get rid of her mum ..... At last she decides to suicide , and wants to get wonderful memories before she leaves this world . She then accidentally bumps on to Ha dong Jae and asks him if he is free to bring her out and play . They have a wonderful day , Kwan soo ah feels really happy and thanks Ha dong jae for giving her such an extraordinary experience that she has never had before . 

At that time Ha dong Jae still hasn't figured out that soo ah wants to suicide , until eunji calls him . He then realises how weird soo ah is acting , normally she will be afraid of being scold by her mother , but she tells ha dong that " I will not scold by my mother anymore"  . Ha dong then immediately runs to find her " kwon soo ah " he shouted , running from a street to another , panting and puffing . He then sees Soo ah standing in the middle of the road . A car is walking at a certain speed , and might kill her if he doesn't rush out to safe her . Despite Ha Dong having Obsessive Compulsive dissorder , without thinking  , he immediatelly runs to the middle of the road and pulls soo ah 's hand and holds her back , hugging her with a wide warm chest . Kwon soo ah burst into tears and hugged ha Dong tightly with her small cold hands