Description：The girls Siji (Kwan Ying) and Ma Ling (Yu Nan) work in the same company and live in the same apartment. One of them carries a germaphobe gene that makes her extremely sensitive to "dirt", while the other has an obesity gene and must take medicine constantly to suppress her weight gain. Both of them are troubled by their inability to establish a stable relationship with others. Siji reunites with her first love, Anteater (Peter Ho), and when the two are happily renewing their relationship, the other's untidy appearance makes it difficult for her to move on; Ma Ling and her boyfriend (Lin Yilun) meet very few times a year, and she longs for normal love, but is secretly in love with the sunny boy Xiao Xiong (Eddie Peng) who lives next door. In order to gain a love that makes them truly happy, the two decide to take drugs to modify their genes. Afterwards, their genes are corrected, but new troubles also follow.