πI recommend the following books to you: " Reborn as a Boss in the End of the World "," The Million Beauty Corps in the End of the World ", and " The Moldy Woman Traversing the Harem: The Barbarian Concubine Is Hard to Pamper ". They were all harem type apocalyptic crisis novels, which described how people had to face their own emotional entanglements and harem struggles while struggling to survive in the apocalypse. I hope you like my recommendation.π