Any good sites for downloading highres manga in volumes?

it depends on what you mean by high res, a lot of manga scans are just barely readable
try madokami for scanlations and google the japanese title plus zip for raws

a fine pic but i doubt yours was from a lossless source

File: 53121230_p0.png (696KB, 681x930px) Image search: [Google]

696KB, 681x930px

>>1541396
Here's the one directly from Pixiv.
https://www.pixiv.net/member_illust.php?mode=medium&illust_id=53121230

File: 656011381515223040.png (740KB, 681x930px) Image search: [Google]

740KB, 681x930px

>>1541423
And here's the original from Twitter which is now gone. I can't tell if there really is a difference in colors or if it's just my monitor fucking up.

File: 1496636792799.png (290KB, 1080x1709px) Image search: [Google]

290KB, 1080x1709px

>>1541423
>>1541426