Become the Strongest Master With a Genius Student

Long ago, there was a legend about a powerful cultivator from the Fallen Rainbow Kingdom. The cultivator raised seven disciples whose mere name alone was capable of shaking all realms. However, many experts who researched hundreds of thousands of years of history suspected the story to be a fabrication as no evidence of the person or his legacy was found.
\"Nonsense! How dare they say the teacher\'s story is just a legend!!!\"
\"There\'s no way I\'m going to accept what they\'re saying! If it wasn\'t for the fact that this planet is where the sect and master used to live, I would have destroyed them!\"
There was a shout in a simple food stall from a girl with no satisfaction. But strangely the scream did not disturb the other guests, as if the scream had not been heard by them.
\"M-students calm down, it\'s been too long anyway. With the short lifespan of humans, they must have just assumed it was a legend. The teacher is not offended.\"
Replied a young girl who was sitting with the screaming girl.
\"No teacher! I can\'t just take their word for it! They have to know the true story teacher!\"The girl continued in an angry tone and continued her endless rant.

_______
Well, this story is about an ordinary man who became a woman (lost his balls) when he was transferred to the world of Xianxia.
Because of his stupidity, he tricked people into becoming his apprentice just to make his life easier, but regretted it because he was afraid of being found out about his lie (because he was an ordinary man? who pretended to be a cultivator).
Occasional weird wording and grammar, English isn\'t my first language.
The book cover is from AI.