I Work as a Servant in My Senior Sister's Cave Abode, Secretly Becoming an Immortal

Su Yun possesses the Chaos Solar Physique. As long as he stays near female cultivators, he can speed up his cultivation.

But he can't get too close.

That's because this constitution is also known as the Innate Dual Cultivation Sacred Physique. If his senior sisters discover it, they'll turn him into a cultivation furnace and drain him until he's a dried-out corpse.

All he can do is keep his head down in his senior sisters' cave dwelling, work as a servant, and cultivate in silence without letting anyone discover his constitution.

From that day on, Su Yun had one great mission:

Make sure his senior sisters don't drain him until he's a dried-out corpse.