
Does anyone know if there are any omegaverse stories where an alpha changes to a beta/omega, or a beta changes to an alpha?

http://www.mangago.zone/read-manga/love_is_an_illusion/?av=2
Kinda, but one of the mc was an omega from the start, they just thought they were an alpha

http://www.mangago.zone/read-manga/tadaima_okaeri/
This one is even fluffier ٩(๑❛ᴗ❛๑)۶

PSA: If your partner is so possessive of your time and jealous of everyone else you know that they make you cut others out of your life, if they are prone to emotional outbursts and holding grudges, and if they try to manipulate you into doing what they want by issuing ultimatums or telling lies, they are not able to handle an adult relationship and you should find someone else.
This series is such a time capsule, with the setting in the 80s and the art style. It's not my favorite manga, but it's a refreshing change of pace from the type of stuff that's usually in this genre. Interesting read.