It was aplha x alpha Alpha uke was succesfull man while alpha seme just ordinary guy They had sex and bcs seme cum inside uke, uke slowly turns into omega (uke family hates omega i think) , and plot twist in the end seme pierce the condom with needle (i think because seme wants uke become his omega?)
Cannot wait too see adult version of ume !! I bet he will become that smexy seme and there will be cute babiessss