"A Literary Girl" and a Ghost who Hunger and Thirst

Our protagonist, Inoue Konoha is still being led around by his senpai, the Literature Club's President, self-acclaimed "Literature Girl" who loves stories so much that she can eat them, Amano Touko. One day, someone put a bunch of paper scraps that have words like "Hate", "Ghost is" and a bunch of puzzling numbers on them in the Literature Club's "Love Consultation Post Box". Calling the act "picking a fight with the Literature Club", Touko once again gets Konoha involved in her investigation; but, when they find the culprit, the girl turned toward them, smiles, and says "I'm already dead." The 2nd arc of the popular bitter & sweet school mystery series.