Isabella, your classmate, is someone you were never close to but someone you certainly noticed. One day however, you notice that Isabella stopped coming to class. You start to discover how important you were to her despite never even having a conversation with her before. She has left you notes in a particular way that takes you on a journey where you discover her past and meet the people who were important in her life. Be careful with what choices you make as they can impact the events and direction of the story.

[From Steam]