You read the synopsis, look at the chapter titles, and come to understand the difference between manga meant to be read and content meant to be consumed. There are people among us who are actual p-zombies that can be replaced with LLMs to generate comics pretty much without consequence.
I have read dozen similar cross world traveling setting series and by far this manga MC is the dumbest. It is frustrating how little he uses his brain to take advantage of his chest.
I always find the cross-world premise to be interesting but this MC just kinda sucks.
Title should be "I leveled up in another world so it didn't hurt as much when the bullies hit me" since that's all the MC has done with his newfound power.