The Reincarnated Villainous Young Master's Guide to Happiness

In Neo's past life, he was a wicked man who schemed wickedly against those he should not have. It is what led to his eventual demise at the hands of those people. Then, after becoming a successful medical researcher in this new modern world, he died again due to his workaholic nature and was sent back to the beginning, before his schemes and wicked deeds offended the wrong people. This second chance...