An Incompetent Explorer Who Failed to Make His High School Debut but Mastered Being a Human Being ~ For Some Reason Beautiful Girls Are Approaching Me One After Another Despite Not Having A Level, Skill, or Ability Score ~ Chapter 101 Discussion

So, this is basically a poorly written version of Solo Leveling, with the MC having One punch man powers instead of being a necromancer. He gets his OP powers effortlessly which contributes to his idiocy of not realizing he's OP and at the same time dense about his popularity. As of 101, there's nothing to threaten him, he has god level ability but definitely the dullest tool in the shed.

As for the similarities of Solo Leveling, there's the dungeons suddenly appearing across the world with another world causing it some how. Using the dungeon's abilities, the other world is trying to invade this world by filling it with magic. An agency or association is formed to control explorers entering the dungeons. Oh and of course the dungeons can "break" or in this its called "Stampede" in which monsters leave the dungeon and invade this world.

His father, like in Solo Leveling was killed in a dungeon and his mother and daughter are left to be cared for by the MC. While in this story the MC starts out by trying to make his high school debut, Solo Leveling has the MC already graduated

Overall, this story might have been more enjoyable if it was actually original and didn't carbon copy the plotline of Solo leveling and add some cliché points to make it "different."