When Batman, Marked by Red Hood in an ABO World, Arrived in a Parallel Universe

Jason, an Alpha, re-differentiates as an E after bathing in the Lazarus Pit. An E can mark an Alpha and turn them into an Omega.

After learning that the Joker was alive and that there had been three Robins, Jason angrily bit Batman's gland during a fight with him. Batman didn't resist out of guilt, and a twisted relationship began...

Content warnings:

Jason/Batman, pregnancy and childbirth (possibly)

Out-of-character characterization warning

Theme: Uphold the core values of socialism with Chinese characteristics