Ni De Weidao You Dian Tian

Due to past psychological trauma, Tang Chao never developed secondary sexual characteristics, so she lived life as a beta working as a magazine model. After an accidental one-night stand with an omega, she found out that she felt strongly attracted to that omega. The next day she met a new colleague Li Zhixu, who seemed to be that omega. But... this Li Zhixu was suppose to be a beta? (Source: Bilibili, translated)