Fan communities on platforms like Reddit (e.g., r/ChainedSoldier) often host "Raw Discussion Threads" the day a new chapter drops. Dedicated translators frequently post detailed text summaries of the dialogue, allowing you to look at the raw art while knowing exactly what the characters are saying.
The Japanese release is the absolute source. Reading the raws means you are fully caught up with the active plot developments, character deaths, and major transformations before they leak on social media. mato seihei no slave raw manga