I like system and personality of mc of that novel. So I want to harem novel like those two novel. Have good laught, harem , perv situations slice of life with little touch of good battle and mc getting strong by time. Less blood because now almost every every novel full of blood, death and revenge. I already read neet dating system it was good.
How about those two(only first one has a system): https://royalroadl.com/fiction/11693/soul-exchange-program https://royalroadl.com/fiction/8027/my-fiance-is-an-alien Oh, and that last author has a few a few more similar ones. Edit: But if ya explicitly want a novel with a base-building system, then dungeon reincarnation ones should be just right.