Little is known regarding Unsuur's past, or at the very least, the few who do know talk about it, but he did have to end up there somehow.
Disclaimer - I don't own My Time At Sandrock. This was written for the Froday amnesty for July 2022, which was posted a bit later than usual for prompt 11.21. It was also written for the following Plot Bunny Obstacle Course prompt with the word list I generated being: seem, grace, lose, lay, endure, side, and tooth. Words which are to be used are in bold.
Prompt:
Generate a word bank of 5-7 random words and build a plot using at minimum 3 of them. For more of a challenge, you can only refresh your word bank twice and must choose one of those sets of words.
Example: If the words were "joy, confront, bike, return, paradox, scream" you might decide to use "joy, return, paradox" to write a time-loop/time-travel fix-it fic. Or maybe you use "confront, bike, scream" to write a story about a bike messenger during a zombie apocalypse.
Kanda Kyoichi transmigrated to Konoha and became a temporary instructor at the Ninja Academy. Fortunately, he awakened the Mentor System.
By teaching others, he could earn rewards.
Thus began Kyoichi's career as a "teacher" in the ninja world.
Shisui: "Sensei's unique interpretation of the Will of Fire has given the Uchiha Clan a true sense of direction!"
Asuma: "The essence of the jade lies in protecting the people, with the advanced leading the way for the less experienced. Only then can Konoha become stronger!"
Kakashi: "He's my life mentor. He transformed Konoha!"
...
Years later, in the memoirs of Kyoichi, now the Hokage, he wrote:
"I honestly just wanted to be a life mentor!"