Dokushin Kizoku wa Isekai wo Ouka Suru: Kekkon Shinai Otoko no Yuuga na Ohitori-sama Life

Toshinori Dokuraba, 35 years old. A so-called single aristocrat in Japan who enjoyed a single life without wife and children, even though he was tall, handsome, highly educated and had a high income. One day, he died alone at home.
However, he was liked by Hitorigami, the God of another world, and was able to reincarnate in that world. Reborn as Zirc Louren with skills and blessings from the God, he lived a new rosy life in a different world - then he turned 28 years old and enjoyed the single life again. This is a story about the life of a single aristocrat who never gets married even if he reincarnates in another world.

https://www.cmoa.jp/title/255162/