Anime: I Want Harem - Chapter 25

The summer of 2006 was very hot. Chen Yang, who had just graduated, decided to borrow a sum of money first to make his future different.

- Description from novelbuddy

In his past incarnation, Lu Xuan was the youngest Celestial Lord that the universe has ever seen!
An accidental rebirth brought him back to a thousand years before, where the Earth had just begun its spiritual reawakening. When he stepped onto the way of cultivation for a second time, he swore to rewrite all injustices suffered in his past life, and defeat all enemies that dare stand in his way!
Let invincibility be his cultivation and the path he treads. In this life, it is his destiny to be invincible!

Beasts of all kinds—spiritual beasts, demonic beasts, rare beasts, celestial beasts, ancient relics, dragons of fortune, sword spirits, corpse puppets, gu insects, mechanical marvels, and elemental spirits—every form and technique can be mastered.The story begins in a third-rate cultivation sect, the Beast Taming Sect……Struggle through the weak paths; ascend with the mastery of beasts!

Instead of causing chaos with my knowledge of the original work, I assisted the protagonist.

I successfully completed the story and now planned to retire and live peacefully.

However, it seems the protagonist still needs my help.

An academy professor? That’s nothing much.

But why is the state of the academy so strange?”