This strategy guide will show you how to get all the endings and achievements for the Dear Monster game. It's a PDF file.

NOTE! LOOK HERE!

This is how you find your DLC after you purchase it. Once you purchase and install/download the Strategy Guide in the DLC list of Dear Monster in your Steam Library, you can find the files for it in your Local Files. Right-click the name of the game (Dear Monster) from the list of games in your library, click Properties, go to the Local Files tab, then click Browse Local Files. You'll find the Strategy Guide in this folder.