Quick Transmigration: The Scumbag's Self-Reformation

Every world has a scumbag man. They either abandon their wives and children or abuse their wives and beat their daughters. Yu Nian is just as much of a scumbag, and now he must reform himself under the System’s supervision. But as the System watches Yu Nian complete one mission after another perfectly, it can only marvel. How is he so different from the person it first scanned?

World One: Childhood sweetheart who cheats (completed)

World Two: Nineties gangster and gambling addict (completed)

World Three: Spoiled young lord in ancient times (completed)