From the Start, I Link Up with the Campus Beauty

It should be a post-apocalyptic wasteland style novel. The overall background and the appearance of the main characters are quite good. The protagonist has not shown any obvious intelligence yet, but similarly, I don't think the main protagonist is very witty. So far, I have not seen what the protagonist wants to be in the future. He seems to be living in the past when his parents died. As long as others tell him that he has the present of his parents in his hand, he will not hesitate to join the mission.