I recommend " Tokizaki Kozo in the Other World " and " Transforming into Tokizaki Kozo " to you. The former is a light novel, a derivative doujinshi novel, about an otaku who transmigrated to a different world and became a girl, and it was a Kozo. The latter is a funny novel that tells the daily story of a cute Kozo in the other world. I hope you like my recommendation.😗