mdzs omegaverse/vampire?? au where depending on your secondary gender [once you present] you have a mark that represents your mate (NOT your fated soulmate, that one is different)
omega- lower belly
alpha- under collarbone/ side varies
beta- shoulder
#wangxianau once you’ve actually met them [fated soulmate] a piece of jewelry (ex. ring, necklace, bracelet) will begin to form on you and will tighten the longer you stay close to your mate without an official bond.

So when the Second Jade of Gusu begins to wear robes with higher collars+