Kotonoha Project

Background
Kotonoha Project is largely a series of interconnected stories made for the SEGA rhythm game maimai. The story of the series centers around second year highschooler Tsukasa Kuzunoha, a young man who can "hear" Honne, monsters formed from the "true face" of people's feelings, and give them physical form. The songs explore five major incidents involving Honne; in each installment, he encounters a person, tries to resolve the situation by defeating their Tatemae, and a followup song that follows the character interacting and adjusting to with their honne afterwards.

There are eleven songs in the series, broken up into five main chapters (consisting of a part 1 and part 2) and one side story. Only the first three chapters have been brought to disk as official maimai albums; the other two have yet to get a physical release.

Web Novel
The entire series has an online novelization available for free on the official website, also broken up into five main arcs. Altogether, the novelization has 21 segments and 101 chapters.