The normal ending in Mystic Messenger can't be simply considered the true story. It's more like one of the many storylines the game presents. Different players might have different views on which ending feels truer to them based on their experiences and choices within the game.
The Visual Novel Mode in Mystic Messenger is a gameplay style that presents the story through static images and text, allowing you to make choices that affect the outcome.
To enter the visual novel mode in Mystic Messenger, usually you have to progress through the main storyline and meet certain conditions. It might involve interacting with characters in a particular way or achieving specific goals within the game.