The Summer You Were There Vol. 4 (manga)

Shizuku is a shy high schooler who hardly talks to other people. Instead, she loses herself in writing, crafting a novel that she never intends to show anyone. But when her cute, popular classmate Kaori gets her hands on Shizuku’s manuscript, everything changes. Kaori suggests that, in order to give Shizuku material for her next book, the two of them should start dating! Can this mismatched pair create their own happily ever after?