Have a Harem at the Start?

What? The school beauty at the beginning, the neighbor... Fell in love with me, accepted it all? The parents of a business tycoon were assassinated by villains and died tragically. He only lived with his sister. The good student who was originally excellent in both morals and academics was ruined. I got a ring by chance. I want to change my life to get everything back. I want to take revenge and become the strongest. On the way to revenge, I discovered... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.