An old man dies, torn by regret. Due to his high karma, he has "near-limitless possibilities for reincarnation". He chooses to reincarnate in a fantasy world as a voluptuous futanari succubus with big tits and an irresistible smile.
I read this entire book on a different site and loved it. 300 characters is insufficient for my praise. You will repeatedly be saying “my emotions!” because every chapter is filled with moments that grab ahold of the entire range of them. A seriously great read.