Ushio and Tora - Vol. 6 Ch. 52 - 'The Toono Youkai on the Warpath' Part 6: The Youkai's Fight with Hakumen no Mono

[MangaDex]

 

[Sode]

This is kinda stupid. Tell me how can you have kids if you're always cooped up in the barrier? Did the girls protecting the beast had sex inside the barrier? LOL

 

[Levankua]

This is kinda stupid. Tell me how can you have kids if you're always cooped up in the barrier? Did the girls protecting the beast had sex inside the barrier? LOL

They probably are raised and trained to hold the barrier and take over at some point in their adult lives. Probably why ushio's mother disappeared when he was young.