Kill Me More Times, I'll Become Invincible - Chapter 287:

One day, I woke up only find out that I’d become a Demon Lord, an individual responsible for protecting a dungeon. The world I’d been spirited away to was one filled with violence. Gigantic monsters wandered through it and competed with each other each and every day for the right to survive. I had no choice but to strengthen my dungeon’s defenses in hopes of living another day—or at least that was what I’d thought. For some odd reason, I instead ended up spending my days in relaxation and bliss.

A black pearl brought Jiang Feng from a doomsday stage where top masters with one emperor, two emperors, three emperors, four deities, and seven peerless cities show off their glory to parallel time and space, and this time and space-the end of the world has not yet opened! !! Under the sky, the youth look up, if I have strength, can I get through … these two time and space! !!

- Description from 69shu

“I don't want to die anymore, so I'll aim to be the strongest――!”After being stabbed by a random attacker, he was reincarnated in Japan, a place where 'demons' like yokai and monsters exist――and moreover, he was born into a family of 'exorcists' who exorcise these monsters!Exorcism is an important job that involves killing monsters, but it is also a dangerous job where people can die.Therefore, he――Itsuki, made a decision.In order to never die again, he would become strong.He aimed to be the strongest and practiced magic tirelessly since he was a baby――until he realized.“Huh? Isn't this too much?”This is the story of an exorcist who, despite being an ordinary person, became the strongest without realizing it due to excessive effort.

What would you say is the most valuable thing in this world?