I recommend the two books," The Host Is Someone I Can't Offend " and " Harem Sign In: Nine Thousand Years Aren't Called For Nothing ", to you. The former was a sci-fi space-time travel novel, and the host's mission was to bring happiness to the target. The latter was a fantasy novel, in which the male protagonist brought the check-in system to the Great Qi and became a little eunuch. He constantly leveled up, became stronger, and obtained treasures from the check-in rewards. Both books had funny plots, and the harem elements were also more prominent. I hope you like my recommendation.π