Not only omegaverse but it all about the male/man
pregnant
P/S:
beware some story contain rape scene..
Top are completes
Bottom are still ongoing
With hope not being drop out by translater!
Also Mpreg (Kedamono Arashi)
http://www.mangago.me/home/mangalist/513036/There some mpreg under webtoon list
http://www.mangago.me/home/mangalist/515882/ 
