A dude who played a game wakes up inside that game as player and finds out the characters he played as were actual humans that he somewhat ended up killing. Now he’s a character that another player is “in control of” and needs to level up so he can conquer the tower and survive. But honestly there are better manwha with this trope out there, it’s rushed and there isn’t much emotional depth, just MC commending incompetent characters and threatening them that their player will get rid of them otherwise and lots of side characters death that neither readers nor characters care about.
Great art really, but all girls are drawn half naked and MC aura farms while most other characters are just there. If you’re gonna give it a try you might like it but stuff like Omniscient readers viewpoint is more of my thing rather then this Solo Leveling lookalike.

Can someone spoil/summarize the whole plot to me?