Transmigrating to Another World and Awakening the Invincible Farming System

Transmigration + farming + fantasy, with no saintly protagonist. Modern overworked wage slave Li Genda works overtime for far too long and, in a careless moment, gets the transmigration-and-death-from-overwork package deal. He awakens an invincible Farming System, and the younger sister who grew up with him turns out to be a seductive cat demon. As the protagonist grows stronger, he also settles into a shamelessly indulgent life.