I've played this game even before it was in English Language. My friends and I had to find translation patches to play this but it was really worth it. When the game was just beginning, when no single person can solo that Tower Dungeon, we had to come up with good strategies to rise on each levels especially the boss levels. We also had to grind every day to earn items and get stronger, the old MMORPG way.
Some of my friends stayed for the competitive stages while some like me already left but it was hell of a 2 year (2017-2019) run for us. Had lots of fun memories grinding and dungeon running.