Babies? In what chapter and page
Well in their world apparently Nier (normal human) males can get pregnant too through the power of their modern technology and money, which our boy Haruka now both have. I'm just waiting for their babies now tbh. Oh and the Siren brother's love story too.
The pregnancy is explained here:
http://www.mangago.zone/read-manga/beast_of_blood/uu/mpn_chapter-2222400/pg-2/
I mean why would they comment on it, if it's not going to happen, it's just a hypothesis
Two things....do I smell mpreg? and...WTF WITH THOSE BABIES?!?!?! HAHAHA OMG