This is a story of a very OP MC who is so good at Judo, making financial investment, speak and read in a few languages while remembering to solve crimes like school bullying+ extortion, scam and gangster by himself while praising his past as a cop that it borderline on fan fiction of how incredible this person is and wondering about the police officer part especially when the story focus on Judo and investment because the MC need money.
This story seems to be in many directions and forgetting about the plot about a police man returning to the past to solve crimes or something not making money and have everything goes his way easily.