Holding the Elder Sister’s Thigh Tightly: I Will Be Invincible!

Novel Summary
An inner disciple, Chu Yan, was accidentally bound to the elder sister’s fate.
From then on, Chu Yan learned ten times the achievements of the elder sister’s practice.
“Elder Sister, this is a hundred-year-old fire spirit fruit, please accept it with a smile!”
“Elder Sister, a thousand-year-old divine beast’s inner elixir will help you break through the extreme realm!”
“…”
“Why am I so kind to you? I am Chu Yan all my life. With only one sword, I only want to conquer you all my life!
– Description from readMTL