I Became a Swordsmanship Instructor at the Academy

Read manhwa I Became a Swordsmanship Instructor at the Academy / 아카데미의 검술 강사가 되었다 / The Academy’s New Swordmaster
The protagonist is reincarnated in the body of Kang Shin-hyuk, a background character from a popular novel. Shin-hyuk decides to leave saving the world to the original protagonists and enjoy a wealthy, carefree life without interfering with the novel’s plot.

However, he discovers discrimination against non-Hunter school graduates at the school where he works.

To avoid being looked down upon by his fellow teachers, and to lead a comfortable life, Ayumu begins his reincarnation journey, determined to become strong enough to protect himself… even if it means slightly altering the original story.