If the author made a wholesome story about the mc getting better with his daily life it would be pretty good manga instead a generic isekai manga where the mc will get a harem.
shucks... if my grand child was in this kinda situation... man id be screaming at my children for their lack of support for the poor kid... also imm a humble the shit outa my other grand children if they where dicks to each other...
@puppeto4 Yeah, this felt very forced and artificial. Of the pitiful edge isekai beginnings, "Ubau Mono Ubawarerumono" is one of my favourites because it's so simple and dirty. You could actually imagine it happening with totally broken drunkards and drug abusers.
Aside from him having absolutely nothing similar to his family, the author is like saying that the abody he was born without his concern is a shame and he can't be a proper human if he doesn't change that appearance to a handsome guy
Way to go
this is my theory, i think the person who can open the another world door is only those who has the title "the master of doors". So that's why his Grandpa was waiting for his death and so the MC could get the title.
Edit: Nevermind it has been explained in chapter 2