Kasadera Chiaki is a 1st year student from Nekochiya High school. He lives in the same pension house as Ten, Riku, and others. His hometown is Mimese. Chiaki has a very calm and introverted personality, almost all the time reading a book ignoring his surroundings, compeltely opposte personality to Riku. Chiaki while talking also states and references various quotes from different books and authors such as Shakespeare, Aida Mitsu, Ivan Turgenev, etc.

Spoiler

In one of the recent chapters, we see someone calling Chiaki worringly asking him about his stay at the boarding house and if he has made friends. In later chapters it is revealed this is his brother. It is shown in multiple scenes how Chiaki apprently dislikes his brother for reasons not revealed.

Relatives - Unnamed Mother - Unnamed Father - Chitose Kasadera (Older Brother) - Unnamed Grandfather