Beta(top)XAlpha(bottom)

https://www.mangago.zone/read-manga/colossal/
it is mentioned that the top is a beta and the bottom is an alpha but it's not a story yet so yea
ps. the bottom gave birth

Read “The Coast of the waves”
Still ongoing though

https://www.mangago.zone/read-manga/the_coast_of_the_waves/
https://www.mangago.zone/read-manga/the_muse/ even though from what I understood the beta seme will eventually turn into an alpha

Breakout scandal