until the recent chapter you can notice the progress, it is not so fast the romance, since it is approached slowly, it would be good also that you make "pov" of the 7 "trinities". I can't say more until more chapters come out, that could show their progress with their training and the girls.
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LIKEjust something else(make a chapter 0 or auxiliary where you put the evolution of the protagonist with his powers, the power rank of that world, the list of the girls who appear so far, a little of what world is this, not for me, but for those who do not know the novel or the anime, among other things that surely someone will put in the comments saying(and how are the girls , in what scale is the protagonist, etc ))