The Ranking of Kings is a great anime about a young kid named Bojji, a short and mute son of a giant named Bosse. Bojji’s mother is a giant as well but died from battle.
Bosse found a new wife Hilling, who is a female human with healing magic. Eventually, she got pregnant and gave birth to a little boy named Daida. Bosse had a past history with another woman, Miranjo. She liked him and she’s the person who set things to set the story in motion.
It’s all fun and games, but the real question is, how did Queen Hilling get impregnated by King Bosse? Since Queen Hilling is a witch with healing powers, she probably used magic, but we’ll never know for sure.