A clichéd story about transmigrating, getting a cheat, and leveling up, thrown off course by a System bug.
Longing to grow stronger, he was trapped in the System's secret realm for a thousand years. The only way out was to level up.
The painful part was that no matter how much he fought, he could never raise his level.
After drawing his sword billions of times and fighting to the death billions of times, he stepped over mountains of corpses and seas of blood, slowly gazing into the abyss.
[Congratulations, System repair complete! You will be teleported back to the real world in thirty seconds!]
The lurking beast bares its claws. All creation will bow beneath the brilliance of his drawn blade!
"What, an SSS-rank monster? Some so-called god from an unknown dimension? Can any of you take a single slash from me?"
This is a harem novel wrapped in an invincible cover. If you feel uncomfortable, please detour and say thank you [I learned it]