This drama was a masterpiece until episodes 15 and 16 aired and turned it into something not even worth watching.
I know that adapting from a novel means changing things so the plot becomes more entertaining but not to the extent that it would ruin not only the journey but the whole experience as well.
the writer here tried to subvert expectations with a nonsense ending for no reason but to create controversy and inflate her own ego, and by doing so not only stabbed the novel this was based on but also tarnished what the title of the drama indicated, the main character by going back to his poor body went against what the title of the drama was indicating, "Reborn rich", everything the ML did and experienced on the journey to the end became meaningless, which means anyone who watched this drama to this point has wasted their time too.

PS:I do no recommend this drama under any circumstances and advice to avoid at all costs.