I don't really remember which one but it was a quick transmigration story. In one arc (world) the MC have some sort of illness that makes him unable to really be social and was quite emotionless. The original owner of the body also have a conflict with their mother because they say something like didn't recognize her as mother or something. When MC take over, they begin to create many gadget/device like flying car because their friend was saying something about it. And that is all I can give as I didn't read the novel itself and just read its review (one of the commenters gave a short summary on each arcs). But I was curious about this story. Can anyone share with me the novel and the arc of the story I just gave. Thanks.