Don't forget to suspend your disbelief and keep your expectations low
Generic enough to make you feel like you've read this already. Another collection of harem girls that lack any IQ chasing after a clueless man. The focus is on fan service and underdog-turned-overachiever. Zero sophistication or originality. Minimal effort for story or plot.
Allen Rodol enters a tournament. He fights against an opponent who can seal their foe in a time-extended world. It only lasts one hundred years so it doesn't affect Allen. Next, Allen fights a true prodigy. Allen almost dies, but at the last second, he brings out his inner hollow or some sealed demon. I'm not sure, but it may be a demon king. Due to that, Allen is disqualified and suspended from school for a month.
The story is pretty good. There are a lot of tropes, and I believe the author borrowed from several other intellectual properties, but it all works out.
I enjoyed the book. Thanks for reading my review, and see you next time.
This entire review has been hidden because of spoilers.