It's a bl novel. The ml is reborn from the apocalypse. He came back to a week or days before the apocalypse happens again so he bought a lot of seeds and he also bought a dog and a rent a apartment I think and he set it up. The other ml has a ability to manipulate steel/iron and I think they meet while the reborn ml is looking at the window at night and he saw the other ml running, he was being chased by enemies or zombies.
https://www.novelupdates.com/series/the-reborn-otakus-code-of-practice-for-the-apocalypse/ I think I might reread this