You can find collected volumes on Amazon Japan or Comic Seymour. The series Koko Jidai ni Gomandatta Jou-sama to

If you are looking for Chapter 1 Raw, many readers search for "free" versions online. However, supporting the official release is the best way to ensure the author continues the story. Japanese Raws : Licensed versions or raw snippets

Japanese Raws: Licensed versions or raw snippets are often available through retailers like CDJapan.  Comic CMOA : Provides a "Trial Reading" (立ち読み)

Discovering the World of Manga: A Guide to Exploring Different Genres

Support the Creators: The story originated as a light novel published by Dash X Bunko. You can find official physical or digital Japanese volumes through retailers like CDJapan to support the original author and illustrator.

Comic CMOA: Provides a "Trial Reading" (立ち読み) version of the first volume/chapter. Series Overview