This is a revenge novel. MC is stuck in a time loop and dies 100 times in many brutal ways, ranging from torture to su*cide. The book is about his 101st life where he decides to finally stand up for himself. There are 3 main love interests but there is no definitive conclusion for them as the novel ends abruptly after defeating the final villain.

The MC was overly kind and naive during his first 100 regressions to the point where suspension of disbelief becomes difficult to maintain. This is fixed in his 101st life, but early on in his regressions his sister tortures him to death in an extremely graphic and painful way (loss of all limbs, buried alive), causing severe PTSD that haunts him up to his 101st life. How does the MC respond? By leaving her alone and not trying to kill her in response in any of the subsequent regressions up until the 101st, still believing she might be able to be changed.