New Body? I Am The Billionaire Now!

Ethan Stuart is a common freshly graduated, working secretary who did overtime to get more bonuses and learn more and more. His boss was the one to take the credit for his hard work instead. His only solace was the eroge games he played at night.
He was reaching the top of his career early because of his skills and good knowledge when it came to business earning the jealous stares of many until a new grim reaper made a mistake and his soul transmigrated into the body of a good-for-nothing illegitimate son of a billionaire.
When he realized the true worth of his body, he knew he would be not only rich. But he would achieve a place that no one had ever thought of. Returning to their house, he started to build an empire with the help of his skills and the bunny reaper.
And if he had the support of the newly hired grim reapers, he did not need to worry about the goons who come to kill him at night. Right? No! Not only that, he can save many beautiful damsels in distress and win their hearts!
But only one was hard to win. And that was his fiance!