(NOT FROM THE ANIME, SORRY) -there was a tradition in his kingdom, that every prince that has turned 13, gets to choose a god of any power to be their servant or lover, and the next day, it would be his turn to choose, so his parents threw him a huge celebration- “I’m almost 13! I can’t wait to get my god or goddess! I wonder if I should make them my servant or my lover, I’m so excited!”