Completed BL manga reccomendations please I'm so bored^

for those that don't get it

quite the poor taste for jokes you got my man!

I was using Desmos (graphing calculator) for like 3 hours so when I made an account it was just the first thing that came to mind. though I did change it a little

some kind of Isekai probably. 

so with the world building, infinite number of worlds exist in a system where human growth is countered by a force of nature that takes different forms in a each world, so basically the more advanced humanity is the stronger the force of nature 

MC originates from a world in which humanity lost, the MC was one of its frontliners that tried to fight for humans. after realizing that humanity got wiped out, she wakes up in the world of a novel that was gifted to her by one of her comrades, a bestfriend, I suppose (she read it 40+ times since it was one of the only source of entertainment in an apocalyptic setting). the friend gifted the novel to her because in that novel, a character that have the same looks and name with the mc exists.

the novel is actually a physical manifestation of another world that her friend found, the friend gifted it to the mc because the mc's other self (?) in that world lived a happy life. the friend wanted the mc to live that life, in case humanity lost so the friend used their powers to make it possible. but this is kept hidden to the MC though 

that's as far as I got

it could be a translation issue. I'm = I am so that also makes up 4 words