Tobi Otogiri, a second-year student in middle school, doesn't spend much time with his peers. Instead, he mostly chats in secret with his pal Baku, a mysterious backpack he received the day he last saw his older brother. Or at least, Tobi thought his chats were secret until a girl in his class named Ryuuko suddenly mentions Baku. Soon, strange things start happening at school, and the two of them realize the cause might be a creature only they can see… Thus begins an adventure blending reality and fantasy, human and nonhuman—a story about life eating life. (Source: Yen Press)
The manga centers on Tobi, who lives an unchanging daily life with a talkative bag named Baku, until a girl named Ryuuko appears in front of him. (Source: ANN)
On the day of his high school entrance ceremony, Rei is suddenly assailed by a feeling of languor. When he wakes up, he finds that his surroundings are filled with things that could not be called human. In a town where strange phenomena continues to stretch, a group of lonely youths have their encounter.

