A freshman at Decelis Academy, Kim Sunoo, is excited to start in the same school where their other friends from the friend group were. Lee Heeseung, Park Jay, Sim Jake, and most of all, Park Sunghoon.
They split away since they already graduated from middle school, leaving them in their Junior year, while Sunoo, Niki, and Jungwon just started the school year.
Before they split, Sunoo and Sunghoon were the closest to each other. Ok, I'll admit that they even liked each other. Everyone knew, except them.
Now that they've come together, and reunited, and Sunghoon is ignoring Sunoo, one of Sunoo's best friends, Niki has to play the role of Sunoo's boyfriend.
Sunoo's 16th birthday finally comes and a name is revealed on the back of his nape. This only happens to about 30% of the world's population when they turn 16.
Sunoo didn't even know about it, nor did he think he was going to get it!
Confusion, jealousy, and light angst all around the air. Yikes. The tension is intense.
How does Sunghoon feel about this --, no, how does he react?...
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!"