I've Already Confronted the Five Kage, and the System Just Arrived! - Chapter 171 -

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.

[Disclaimer: Slow storyline, contains hypnosis, pregnancy, tragedy, netori, and Anti-Hero genres]Author : Andi CandraSynopsis:A young man from Indonesia transmigrates into an anime world. Taking over the body of a person named Rokuhara Ren, he is stunned to see the 2D characters he once only watched in anime come to life.Like countless other transmigrators, he plans to build a harem. Within just a year, Ren successfully impregnates his homeroom teacher, Nakano Itsuki, and his classmate, Maria Mikhailovna Kujou.He thought his peaceful life would continue. His view of the slice-of-life world crumbles when he encounters Yotsuba Miko, Gentōga Keitarō, and Ayase Momo. To make matters worse, Ren discovers that there are also Campiones in this world.Oh no, how can he raise his children with so many unstable factors?There’s no other choice—he must become a Campione himself!Witness the life story of a scumbag rising to become a Campione respected by the world!

For unknown reasons, he finds himself transported to a parallel world's Japan, unexpectedly taking over the body of a soon-to-be high school student who had died accidentally. Surprisingly, he did not inherit any memories. However, the first challenge he faces upon arriving here is a language barrier...Just as he struggles to communicate with his new family, a heavenly voice arrives: the black technology system has been activated, and the initial item—translation konjac—has been distributed.This is the story of someone with above-average intelligence but almost no physical strength in the Classroom of the Supreme Power.

Starting from today, I am retired. But what should I be doing? I neither have the skills, nor the mind to do business, my only advantage is this pair of hands which have taken this world. What a headache…

Note: The usage of the term “retired” here doesn’t mean retiring from old age, work etc. It’s a specific term to refer to not involving oneself in the affairs of a certain society.

- Description from Novelupdates