Comment by kaykaychan on Sour Cinnamin

@kaykaychan ok so the main character works under this big company with inheritance fights of it's shares between the many siblings and their children. The siblings keeping doing stuff to get on the father's good side to make sure their children (grandchildren of the father) inherit the company. The mc was loyal to this competitive family who was used as a slave by them so as a result he knew many secrets of the company but the family killed him off since he knew too much( at this timeline the founder of the company- which is the grandfather was dead) . But mc repressed into the past as the son of the ostracized man who was somewhat disowned by the founder, he travelled back to the very moment of this big family gathering where he ended up impressing his grandfather so his uncles and aunts feel threatened the same way it is in this Manhwa since the grandfather was so impressed by him
See how similar it is?