Sword Immortal Starts by Teaching Junior Sister

[This book is also called: "Senior Brother's Teachings to Me Have Ulterior Motives". Ning Yu was reborn in Cangming Tianxia and became a direct disciple of Lingxiao Sword Sect. In this world where swordsmen are seriously involved in involution, his ideal is to become a generation of swordsmen. Unexpectedly, he was dumped by his master and was responsible for teaching the junior sister who was suffering from princess disease. This made him tortured and overwhelmed. Until one day, Ning Yu awakened to the "Education" system. Correct the bad habits of the junior sisters, teach the junior sisters the principles of life, and urge the junior sisters to work hard in practice... No matter in any aspect, as long as the junior sister makes progress, Ning Yu can get rewards and become stronger. So, Ning Yu took off...