This is pretty good, but the dialog layout is fucked up. The artist needs to allow more room than just the margins for speechbubbles. Straining my eyes just to read it.
For the last image, at least, you can find a higher resolution on hentai-foundry: http://www.hentai-foundry.com/pictures/user/Riendonut/520109/Commission-Dez-x-Vem-Beach-Day-2-2 I''ve looked on all this artists' profiles for better versions of the other three and come up empty, though. So I guess Waifu2x might be the way to go if you want to read them. They're also on this artists' patreon in higher resolution, but I can't afford to be spending money right now...