In Another World Experience: Together With A Lewd Elf (Genderbender)

No demon lords to defeat, no betrayal to take revenge on, and no levels to grind. Just the fast-paced erotic adventures of an op genderbent elf.

Long summary:

Eria, peviously a man, was reincarnated into another world as a gorgeous and bountiful elf woman. In her very first adventure, she managed to get the affection of a certain noble, who proceeded to pursuade her into giving up her chastity. Having tasted the pleasures of being a woman, she starts to seek for more.

Now, almost a century later, another noble appeared in front of her. Thus, a new perverted journey starts.

Disclaimer: Not for all audiences, it's R18