Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 17 - 17-27. Authorities on Loan

A seafood chef inexplicably transmigrated into ancient times. Even though he landed in a family with a nobility rank, and theoretically was supposed to be rich, the most valuable thing in the house is a grey donkey…
Su Yu stared at the sky helplessly; in order to support the family, he could only take up his old profession and go out to sell fish.
Unfortunately, the royal family selected concubines from both genders. Even as a poor noble, he had no choice but to attend…
DISCUSSION TOPIC: Will I be selected if I display my fish-slaughtering skills?
“Meow!” His Imperial Majesty shook his tail.

- Description from Novelupdates

Transmigrating into a parallel world; becoming a billionaire that everyone looks up to. Qing Tian, who had thought he could finally live a life of wealth, suddenly finds that this world seems just a little strange… His son, a junior studying in college was beaten by a stranger who had just arrived in the city? Does this kid want to slap my son across his face during the student union?

【Ding! the Ultimate Villain System is awakened】

【Reward for successfully educating my son: Divine Toxic Medicine】

【Reward for successfully changing the plot trend: God-level car skills】

【Reward for successfully capturing the female lead: plus…】…

As the father of a villainous rich kid, not only should he educate his son, but he should also do whatever he can to deal with the protagonist…

A calculating merchant of noble birth lives a comfortable life managing his guild's business at the Imperial Academy—until lightning strikes him, leaving him with prophetic visions of a disastrous future. In these visions, he's expelled from his family, branded a traitor who aids demons, and worst of all, becomes a penniless beggar. When the supposed “protagonist” of these prophecies enrolls at the academy, he realizes his countdown to ruin has begun. Now he must use his foresight to rewrite a story where he's cast as a third-rate villain, all while navigating ancient dungeons, demonic threats, and the troublesome “hero” who might be the key to changing his fate.#MoneyIsEverything