I'll assume you're a newbie here, and I'm feeling kind, so here's a pro tip:
See under the file name where it says: 45839881_p1 ?
That's a pixiv manga id. They all have and 8 digit number followed by _px, where x is the page in the manga (starting at p0).
So if you go on Pixiv, look at any image set, you'll see a number in the URL (web address) there. Just replace that number with 45839881, and you'll be on the page for that manga.
Hope that helps!
I thought it looked a bit dark, so I put some gamma correction on it.
Artist is 254e on Pixiv.