The art style in Chapter 1 is intentionally dark, with heavy shadows and detailed linework on the cars and muscles. If your PDF is washed out or missing pages, it is a low-quality rip.
(Please provide feedback or guidance on how to proceed) Shutline Ch1.pdf - Google Drive
Subreddits like r/yaoicomics or r/manga often have "Working Google Drive" threads. Search within those subreddits for "Shutline Drive." Sort by "New" because Drive links die quickly due to DMCA takedowns. The art style in Chapter 1 is intentionally
You want a PDF because you think it is the easiest format for mobile. But consider these superior options: Shutline Ch1.pdf - Google Drive