A New Life Starting from Scratch

First of all, I want to make it clear that this book has nothing to do with re0. There is a time traveler in this story, but he is not the protagonist. (It's really embarrassing to the time-travelers) In this story, there is a person who is considered a waste by others, but is actually very strong, but he is not the protagonist either. (Waste streams have long since fallen out of fashion) There is also a super kendo genius who is obsessed with swords in this story, but he is not the protagonist (although this kind of setting is usually a supporting role) This story also has a passionate idiot who will never give up, doesn't know how to read people's faces, and speaks as he pleases. This is the protagonist. (This is the heroine, though.) As for who the male protagonist is, you will know after watching it.