I never should have accepted that harem System that day...
I never should have opened that treasure chest that day...
I never should have equipped the 'Inverse Black Holy Grail' that day...
Most importantly...
I never should have kissed a little girl to replenish my mana that night...
My previous book was a crossover series starting with Uchiha, with 3.5 million words and a promise of quality! So please read with confidence!
World: The hell-level trial mission, the Nasuverse, is underway ->
This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.
