There doesn't seem to be a well - known 'Became Hitler Korean Light Novel'. Given the nature of Hitler and his historical significance, which is mainly associated with the atrocities of World War II, it's hard to imagine how it would be incorporated into a Korean light novel in a non - offensive and meaningful way. Maybe if it were a sort of alternate history or a very unique and dark fantasy concept, but still, it's not a common or popular idea that I've come across.
I've never heard of a 'Became Hitler Korean Light Novel'. If such a thing were to exist, it would probably face a lot of criticism. Hitler is a symbol of extreme evil in history, and Korean light novels usually focus on themes like romance, adventure, or fantasy. To merge these two concepts would require a very careful and delicate handling to avoid glorifying Hitler or causing historical misrepresentation. However, in the vast world of self - published or very niche literature, there might be something out there that I'm not aware of, but it's not in the mainstream.
I'm not aware of any specific 'Became Hitler Korean Light Novel'. It's a rather strange and perhaps offensive concept at first glance. Combining Hitler with a Korean light novel theme seems very out of the ordinary and would likely be a very controversial take if it were to exist.