Not too much to add to the summary. By "age of romance, " it is referring to the wild west of 1960s Korean industrial development when modern chaebols were formed. MC starts off in the present day, and is some type of heavy industry executive. Some things go to hell for him, he's killed in an accident, and he regresses to the 60s and possesses a guy who became the head of a chaebol that ultimately failed due to not investing enough in technology, safety, and product reliability. So he goes out to build the world's greatest corporate group using his knowledge of the future. And as is typical of these novels, MC is a Gary Stu and never fails at anything.
What is different about this one is that, with many novels I read today, I feel I could crank out that kind of material without an issue. But this novel, putting aside questionable geopolitical and economic analysis, required a lot of background knowledge and/or research in world history, industrial development. Chemistry, economics, etc. So the author did a really solid job in that regard.
However, as some of the other reviews mention, the MC is a racist, virulently anti-Japanese, a jingoist, and a complete hypocrite. And as to any real "romance, " to the extent there is any, its clearly a tacked on afterthought (like the editor or critics forced the author to do it), and is poorly done.
Spoiler
MC meets his to be wife - the daughter of the head of the Rockefeller family - and proposes to her for no real reason other than the benefits she would give him. And of course, this female character, who is purportedly well-educated, rich, attractive, well-connected, multi-lingual, passionately into charitable works, and could literally do anything and be with anyone she wanted, falls for this random Korean guy because he yelled at her for being sanctimonious and naive. He meets her once (when he yells at her and walks off), proposes to her the second time they meet, and she accepts - all in about 1 chapter. And of course she instantly becomes an obedient, passive, stay at home Korean housewife that lets him gallivant around the world, but is always there back in Korea to receive him whenever he bothers to show up. Zero personality or character development. The author is either a misogynist, an incel, or both.
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So, some things to like, but to characterize it in its most negative form, it's an incel-driven Korean nationalist screed.
