Hibi starts working at his old school as a librarian and reunites with his former senpai, Sugino, who's now a teacher there. Although he confessed to Sugino in high school, he was told that his feelings were a misunderstanding and that he didn't understand the feeling of 'like.' Even so, Sugino now says that he likes Hibi. The feeling Hibi has for Sugino now is no longer love - it is hatred… (Source: xiaojiangworld) Includes Fuantei na Signal (不安定なシグナル; Unstable Signal).