'Keep Calm,Mr. Song' is such a grat comic. I definitely recommend it as it has mostly everything in it. It has a strong mc who travels into the novel with a system, romance, fights, great character writing and overall the best thing you can read which has many things included in it but doesn't seem like every single trope in a comic that people generally like is squished in it. I completed reading this in a day, and it was the best. I rate it a 10/10.