The Alien King’s Plaything.

Young Aurora is kidnapped during an alien invasion and she is taken to space by the alien king. He makes her a concubine at first and inducts her into one of his harems. With time, he forcefully marks her and makes her his own. Aurora, despite being in the dungeons for being incredibly stubborn, shows exceptional qualities and knowledge. It is then discovered that she is the descendant of the White Angels. She heals the alien king when he is sick and helps him in other aspects of his life, including building a new kingdom and life in space. The love life blossoms and the hard alien king finds himself falling for Aurora. The love he has for her leads him to move mountains in many areas and in turn, she helps him to heal and find peace, which also results in world balance.