How I Got Stronger by Cringing Myself and the Saintess to Death

My name is Lin Fan. I transmigrated into the body of a menial servant and got bound to the utterly ridiculous [Heaven Rewards Diligence] System. But it tells me to be “diligent” about observing the saintess's bust, “diligent” about asking whether her feet stink, and “diligent” about stealing her underwear. Now the aloof saintess is chasing me down eight city blocks with a sword, and I'm even forced to stay within a hundred meters of her, eating and living together. But wait, why has my cultivation skyrocketed after completing these mortifying tasks? When the world-ending crisis arrives, the saintess stands in front of me and declares to the whole world, “From this day on, I'll protect him from humiliation!”