Eko to Toru series

is a Japanese light novel series written by Yanagida Kokuri, with illustrations by MACCO. The series began publication on February 10, 2013 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
My name is [Eko]. I have no friends. However, [Toru], who is in the department room of the chemistry department to which he belongs, is a humorous "speaking human model" and persistently insists that he is a friend.

[Eko], who was isolated from the class due to an incident that occurred half a year ago, meets [Toru], a human model who speaks in the department room of the chemistry department that he joined one day. [Eko] is a human model who speaks with a voice as if she passed through a voice changer. [Toru] A girl student suddenly starts a strange club activity in which you gently hesitate.

An incident of spontaneous combustion occurs, and [Eko] is suspected as a suspect in the incident ... "Oh my god, I was involved in troublesome things."