Who Comes to the Cultivation World to Farm?

They were minding their own business when an unscrupulous System dragged them off to do a mission, sending them to a cultivation world to quietly work the fields. They thought it was the worst thing that could happen to them in this lifetime, but then they were assigned a senior brother who carries a little teaching baton and gives them one-on-one guidance. But why does this senior brother look better and better the more they see him? And why is the way he looks at them starting to feel strange?

Theme: Protect world peace.