Review Detail of Dnivaravn in Unfortunate Hero's Retirement Life

I enjoyed this novel. The big prologue came as a surprise but I loved it. That means this novel was not without faults far from it. Before describing the failings of this novel I like to say it not intended to hurt the author feelings but it is in interest to make this novel as a better novel. MC cannot go wrong was big let down for me so, there was little to no tension in this fiction. Because there was no failure or great learning experiences for a protagonist, and there was no character development/growth for MC which makes him bland and predictable. I personally liked to see the growth of MC emotionally. Harem was plus and minus for me in this novel, but it dealt good manner unlike other novels, but we see wives only for *** or filler parts. So, I want to request author to explore the relationship between husband and wives (give them more unique personality and chemistry between each of wives to the husband should be different and last but most important issue was a husband and wives do more than *** like interaction, gestures, tease (jokes) and small sacrifices in their relationships which can be explored further). Grammar was not bad but could be better. There were occasional typos. Since I am not a native speaker could not suggest more but need to be improved. I hope this review helps the author. I intentionally pointed out more mistakes than good because I personally believe review can point out mistakes and offer different views.