Shounen w/ Reincarnation Tropes

I’m not sure how to summarize this, but i can’t imagine the pain and loneliness he must’ve felt in the tutorial tower, WHICH WERE NOT EXPLAINED THERE BTW—

MC and the selected few human beings got sent into a tutorial tower and had to finish it before allowed outside. For some unknown reasons, the MC got stuck inside the tutorial tower and can’t get out even when he finished all the trials. After 10(?) years of repeatedly finishing the trials, he finally g

OP MC
Game-like premise

Dude found an auto-hunt button (like a virtual system) and use it to auto-clear his enemies.

Big brother (OP delinquent in his turf) is willing to do ANYTHING to protect his sister. Especially cross dressing and pretending to be her friend to stay close to her and stop the bullying.

I kinda liked it but it’s a bit confusing..

Dude died because of suicide, then reincarnated DECADES of years ago, learnt and mastered the demonic martial arts, died (again), reincarnated BACK to his old self (in the future) but before everything went wrong..?

The latest chapter (I’ve read) is him back from the korean obligatory military training

Just like the title says, its about a low-rank soldier becoming a monarch, but with a twist. Poor MC was regressed into his younger years after he died on the battlefield. In his first life, he lost one of his hands due to the war, so he became crafty with traps to balance his skills. Now that he regressed with both of his hands still intact, he used his knowledge from his experience to change the future in his second life.