Facing the imminent loss of their clubroom, Shuu Yagi, the solitary member of the literature club, strives to save it by brainstorming for the cultural festival. His creative block shatters when he stumbles upon a peculiar situation: receiving accidental diary entries from a girl named Eina through a messaging app mix-up. The stakes escalate when Eina's messages hint at suicidal thoughts, prompting Shuu to intervene by enlisting her help in his writing endeavor. As their collaboration unfolds, Shuu gains a writing partner while Eina discovers a newfound purpose. This unexpected partnership not only sparks a unique bond between them but also unveils deeper connections waiting to be unearthed.