No Cheat in Bleach ? Watch me help Aizen then. - Chapter 31: Unohana Retsu Must Be Dealt With

After experiencing heartbreak from being abandoned, he enlisted in the military.

And then, he became a war hero.

[I was reincarnated as an F-class Hunter.

…it’s a problem because they don’t treat me that way.]

He crossed over to a new world where humans have magical power. They are called warriors. They use their power to kill the monsters that appear out of nowhere. Dragons, Dungeons, and Magic users are pretty common in this world. If you want to live in peace, you need to have that power. You can also become a powerful clearing dungeon.

In this dangerous world, he has a system that can help him grow stronger. But he didn't want to be a high-profile warrior who attracts much powerhouse attention or become a lab rat. He wants to be Low-profile and grow strong using his system.