I Presented as an Alpha, So Why Are You an Alpha Too, Honey?

(An ABO story, no extras! No extras! No extras! A sharp-tongued queen of a young lady × a devoted Alpha who takes action) As the sole heir to the Qi family, Qi Xin should have been an untouchable beauty on a high peak. Unfortunately, Shi Yan, who is quiet and gorgeous, is always around, making it impossible for her to maintain her perfect image. What does it mean for an Alpha to get bitten every single day? And why is this delicate Omega so ridiculously strong when carrying people? Also, shouldn't she be the Alpha? Why is she always the one getting marked?