The story line and the start of the book was good, but later on everything is a jumbled mess, mc is so dumb that every 50 chapters he says that he will improve but no improvement is seen, and had to face the same situation where harem members suffer, then he promises again but faces the same situation over and over again, it has been 350 chapters but we have only met a single succubus who is not awake, there is no plot for mages and there power, mc absorbs power but don't know how to use them without the system, mc only focuses on a single group, and wanted to make them stronger, but have not used the mage power and only guns. around 100 chapters ago he said that the both worlds power should co exist for it to make them stronger, but again noone tried and still the mc group is ignorant of how to use mana and magic . Mc didn't even try to use magic as there is no mention of him even trying to check if he can do it or not. Still world background was good but the story and mc behaviour is not up to par. Serious need of story editing or else the book will keep on going without anything new and thrilling for an isekai novel,
Ps. Sorry for my bad grammar,