Sepia Triangle. Hiroki receives an official offer from Saaya, the acting chairman, to Nadeshiko Academy. There he hears that Yanagi will be invited to the school as a special lecturer. Yanagi, a childhood friend of Hiroki and Kiri, was one of the reasons why Hiroki stopped painting. With his unexpected reunion with Yanagi right before his eyes, various thoughts run through Hiroki's mind. And Hiroki's past is now revealed...