In the futanari world, they don't have blood banks with different types. They have semen banks filled with bags of semen from hundreds of different types of futanari. I mean, in a pinch you never know if you need medical injections as a futanari succubi.
Ending was surprisingly cute. Enjoyed that all the artists afterwords got translated too. I was saying earlier that it's crazy how much futa we are getting these days - just today alone, Aoba Q's first page on EX are uploads from today. Absolutely insane - a delayed christmas gift this year. Good shit.