Farewell Four Years Ago, That Was First Love

The male protagonist and the female protagonist are childhood sweethearts. They have been studying in the same school since childhood. However, the female protagonist suffered from depression in the first grade of junior high school and went for a treatment. She forgot about the male protagonist from that time on, and the female protagonist and the male protagonist have nothing to do with each other. In the second year of high school, the male protagonist transferred to the female protagonist's school, and they met again, and the male protagonist was the female protagonist's deskmate. Since then, the male protagonist has been guarding her... Concept: The fairy love between childhood sweethearts