Kyouseiteki ni Tensei saserareta Ojisan wa Koushaku Reijou (Kiwami) toshite Ikiteiku

Upon reaching her coming-of-age ceremony, the duke's daughter Lee suddenly regains the memories of her previous life. She was once a middle-aged man who had endured a difficult life. A goddess, taking pity on him, offered him the chance to reincarnate—but when he stubbornly refused, she reincarnated him anyway, bestowing an excessive number of powerful cheat abilities and a high-ranking noble lineage.

Confused by such absurdly favorable reincarnation, Lee decides to combine those prior years of experience with these overwhelming cheat abilities to finally pursue a happy life.

(Source: Kadokawa, translated)