I tried reading this. You could say that the MC is too lucky, maybe it's the attribute of being a hero in the novel, he got some powerful and supportive person to help him. That's why he kinda OP in a way.You can see here that the author keeps justifying his power by continuous and arduous training of his. It'll be emphasized here again and again, and he became OP too fast, though maybe it's because of the author's narration.There's some kind of romance, there's a female lead, but it's not the highlight. The FL is not irritating that you often see in Harem tag.I would say that this is kind of interesting because it involves galaxies and other celestial beings. If you like deeper and complex plot that'll made you keep thinking, well this is not the novel you're looking for.Just some typical Shounen.