This is a gigantic comic, hundreds of pages long, so we'll be posting this in several episodes. You're currently at Episode 1, and you can find the other episodes below:
Thanks to yuki-zakuro for making the original comic and for providing textless versions of the pages, and to LMAbacus for translating and editing it! Check out the original over on Pixiv, and the translated version over on imgur or after the break! As usual for translated comics, read from right to left!
Edit: The artist let us know that she would prefer to have one post per episode, so here's the full, up-to-date version of The Lastingness Episode 1!