Aight so, Writing quality is not too bad but there are some mistakes, the one that irked me the most was author writing "Eli jang" the most, just write Eli dude :I
There were many plotholes, the story was forced, some things he said were done differently, for example his wish to customize his body was skipped, also the mafia captain said that he'd have MC fight the strongest dude there but he made everyone fight him, not to mention that he won despite being 11 and only having trained for 1 month. The romance is also forced, dude's getting jealous over a girl who's not his girlfriend. world background is kinda also messed up as by MC taking away Eli should've caused some kinda butterfly effect but it didn't. I wouldn't recommend reading this unless you wanna waste your time.