What? Can You Become Stronger By Licking My Sister?

[Imagination + cultivation + sand sculpture + single female protagonist (or double female protagonist) + "sweet but without swords" + not invincible + not slow to become popular]

Yang Xu has just turned eighteen and has awakened the system. The function of the system is that every time he gets a hint of the protagonist's favor, he can get a cultivation reward.

Yang Xu originally refused, but the system told Yang Xu that the protagonist of this world is a girl!

Yang Xu felt so good instantly, and quickly asked the system to send him the protagonist's information and location.

This time, Yang Xu discovered that the protagonist mentioned by the system was actually his god-sister, who usually had a very cold relationship with him!

And she is currently being tried by the head of the family in the family hall for refusing to marry!

Yang Xu didn't hesitate at all and immediately went to the main hall. When the punishment came, he forcefully protected him, even at the cost of offending the head of the family!

From then on, Yang Xu embarked on the road to conquer his sister.