Another one could be 'Saya no Uta'. It delves deep into a world of psychological horror and abnormal themes. The art and narrative combine to create a very unique and disturbing experience. It's not for the faint - hearted as it contains some rather extreme content.
Euphoria isn't a true story. It's a creation of the writers' imagination, although it may touch on common issues and emotions that many people can relate to in real life.
Euphoria visual novel is a kind of digital storytelling medium. It combines text, images, and sometimes sound to create an immersive experience for the reader. The themes and content can vary greatly, but they aim to draw the audience into a fictional world.